Number 15 facts
The odd number 15 is spelled 🔊, and written in words: fifteen. The ordinal number 15th is said 🔊 and written as: fifteenth. The meaning of the number 15 in Maths: Is it Prime? Factorization and prime factors tree. The square root and cube root of 15. What is 15 in computer science, numerology, codes and images, photo art, writing and naming in other languages. Other interesting facts, videos, news related to 15. ‹‹ 14 16 ››
Interesting facts about the number 15
More photos ...Asteroids
- (15) Eunomia is asteroid number 15. It was discovered by A. de Gasparis from Obs. Capodimonte Astronomical on 7/29/1851.
Aircrafts and flights
- The North American X-15 was a rocket aircraft that was part of the X series of experimental aircraft used by the USAF, NASA, and the USN. The X-15 achieved several speed and altitude marks in the early 1960s, reaching the limit with outer space (the Kármán line) and obtaining information that would be used in the design of aircraft and spacecraft later.
- 02/29/1968 the Aeroflot plane, flight number 15, Ilyushin Il-18D crashed in Parchum, Chunsky District, Russia 74 passengers and 9 crew members died.
Areas, mountains and surfaces
- The total area of Luzon is 42,458 square miles (109,965 square km). Country Philippines (Bicol, Cagayan Valley, Calabarzon, Central Luzon, Cordillera, Ilocos, and the National Capital Region). 15th largest island in the world.
Astrology
- It is one of the lucky numbers for the zodiac sign Virgo and Scorpio.
- What is astrology and what is it for?
Distances
- There is a 15 miles (23 km) direct distance between Brooklyn (USA) and The Bronx (USA).
- There is a 15 miles (24 km) direct distance between Ciudad Nezahualcoyotl (Mexico) and Ecatepec (Mexico).
- There is a 15 miles (23 km) direct distance between Ecatepec (Mexico) and Naucalpan de Juárez (Mexico).
- There is a 15 miles (24 km) direct distance between Goyang-si (South Korea) and Incheon (South Korea).
- More distances ...
- There is a 15 miles (24 km) direct distance between Jakarta (Indonesia) and Tangerang (Indonesia).
- There is a 15 miles (24 km) direct distance between Saitama (Japan) and Tokyo (Japan).
Games
History and politics
- United Nations Security Council Resolution number 15, adopted 19 December 1946. Greek–Albanian and Bulgarian–Yugoslavian border violations. Resolution text.
In other fields
- 15 is the number of letters in the words "uncopyrightable" and "dermatoglyphics", which are the only two longest words there are without repeating a letter
- Dreaming of the number 15 means an alert to get away from the lie.
Mathematics
- 15 is the smallest emirpimes
- 15 is the magic constant of the unique order-3 normal magic square
- 15 is the smallest composite number n with the property that there is only one group of order n.
Music
- Depeche Mode - Little 15 (Video Oficial)
- '15 Feet of Snow ', in Spanish '15 feet of snow', is a song by the Australian rock musician, Diesel.
- '15 Seconds' on a single by the American indie pop band Ivy.
- '15 Minutes of Shame ', in Spanish' '15 Minutes of Shame ', is the debut song written by Kelly Archer, Casey Kessel and Justin Weaver, recorded by American country music artist Kristy Lee Cook.
- '15 Minutes' is the name of a song by the American country singer Rodney Atkins, as well as the British group The Yeah You's.
- '15 Minutes to Fame ', in Spanish '15 Minutes to Fame', is a song by the American rock band Saving Abel.
- More music ...
Religions
- In the Hebrew numbering system, the number 15 is not written according to the usual method, with the letters representing '10' and '5', because those spell one of God's Jewish names. Instead, the date is written with the letters representing '9' and '6'
Science
- Group 15 of the periodic table is sometimes known as pnictogens.
- Phosphorus is the chemical element in the periodic table that has the symbol P and atomic number 15.
Sports
- Rugby. Each team has 15 players on the field at any one time.
- In tennis, the number 15 represents the first point won in a game.
- The best athletes to wear number 15
Bart Starr, NFL; Thurman Munson, MLB; Carmelo Anthony, NBA; Hal Greer, NBA; Earl Monroe, NBA
Please write us
If you know something interesting about the number 15 or any natural number (positive integer), please write to us.What is 15 in other units
The decimal (Arabic) number 15 converted to a Roman number is XV.
Roman and decimal number conversions.
15 kilograms (kg) = 33.1 pounds (lbs)
15 pounds (lbs) = 6.8 kilograms (kg)
15 kilometers (km) equals to 9.321 miles (mi).
15 miles (mi) equals to 24.140 kilometers (km).
15 meters (m) equals to 24.140 feet (ft).
15 feet (ft) equals 4.572 meters (m).
15 centimeters (cm) equals to 5.9 inches (in).
15 inches (in) equals to 38.1 centimeters (cm).
15° Fahrenheit (°F) equals to -9.4° Celsius (°C)
15° Celsius (°C) equals to 59° Fahrenheit (°F)
15 Horsepower (hp) equals to 11.03 kilowatts (kW)
15 kilowatts (kW) equals to 20.40 horsepower (hp)
| The number 15 converted to a Mayan number is |
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| Decimal and Mayan number conversions. |
Weight conversion
15 kilograms (kg) = 33.1 pounds (lbs)
15 pounds (lbs) = 6.8 kilograms (kg)
Length conversion
15 kilometers (km) equals to 9.321 miles (mi).
15 miles (mi) equals to 24.140 kilometers (km).
15 meters (m) equals to 24.140 feet (ft).
15 feet (ft) equals 4.572 meters (m).
15 centimeters (cm) equals to 5.9 inches (in).
15 inches (in) equals to 38.1 centimeters (cm).
Temperature conversion
15° Fahrenheit (°F) equals to -9.4° Celsius (°C)
15° Celsius (°C) equals to 59° Fahrenheit (°F)
Power conversion
15 Horsepower (hp) equals to 11.03 kilowatts (kW)
15 kilowatts (kW) equals to 20.40 horsepower (hp)
Codes and images of the number 15
Number 15 morse code: .---- .....Sign language for number 15:
Number 15 in braille:
| Images of the number | |
| Image (1) of the number | Image (2) of the number |
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| More images, other sizes, codes and colors ... | |
Number 15 infographic
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Year 15 AD
Valerius Gratus was appointed Prefect of Judaea.
Gregorian, Hebrew, Islamic, Persian and Buddhist Year (Calendar)
Gregorian year 15 is Buddhist year 558.Buddhist year 15 is Gregorian year 528 a. C.
Gregorian year 15 is Islamic year -626 or -625.
Islamic year 15 is Gregorian year 636 or 637.
Gregorian year 15 is Persian year -608 or -607.
Persian year 15 is Gregorian 636 or 637.
Gregorian year 15 is Hebrew year 3775 or 3776.
Hebrew year 15 is Gregorian year 3745 a. C.
The Buddhist calendar is used in Sri Lanka, Cambodia, Laos, Thailand, and Burma. The Persian calendar is the official calendar in Iran and Afghanistan.
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Advanced math operations
Is Prime?
The number 15 is not a prime number. The closest prime numbers are 13, 17.
The 15th prime number in order is 47.
Factorization and factors (dividers)
The prime factors of 15 are 3 * 5
The factors of 15 are 1, 3, 5, 15.
Total factors 4.
Sum of factors 24 (9).
Prime factor tree
Powers
The second power of 152 is 225.
The third power of 153 is 3.375.
Roots
The square root √15 is 3,872983.
The cube root of 3√15 is 2,466212.
Logarithms
The natural logarithm of No. ln 15 = loge 15 = 2,70805.
The logarithm to base 10 of No. log10 15 = 1,176091.
The Napierian logarithm of No. log1/e 15 = -2,70805.
Trigonometric functions
The cosine of 15 is -0,759688.The sine of 15 is 0,650288.
The tangent of 15 is -0,855993.
Number 15 in Computer Science
| Code type | Code value |
|---|---|
| Unix time | Unix time 15 is equal to Thursday Jan. 1, 1970, 12:15 a.m. GMT |
| IPv4, IPv6 | Number 15 internet address in dotted format v4 0.0.0.15, v6 ::f |
| 15 Decimal | = 1111 Binary |
| 15 Decimal | = 120 Ternary |
| 15 Decimal | = 17 Octal |
| 15 Decimal | = F Hexadecimal (0xf hex) |
| 15 BASE64 | MTU= |
| 15 MD5 | 9bf31c7ff062936a96d3c8bd1f8f2ff3 |
| 15 SHA1 | f1abd670358e036c31296e66b3b66c382ac00812 |
| 15 SHA224 | 87592c38e2b36a1d35437714ecedee4d6fad7a1a0b1bf5d7a2ab68ef |
| 15 SHA256 | e629fa6598d732768f7c726b4b621285f9c3b85303900aa912017db7617d8bdb |
| 15 SHA384 | 234bc95f992148c77dff31709daab681994a9604617e25fe1233c010ac8a98f53a4df41da3f7f6d18fc8b51ade37c9fe |
| More SHA codes related to the number 15 ... | |
If you know something interesting about the 15 number that you did not find on this page, do not hesitate to write us here.
Numerology 15
According to Wikipedia, numerology is based on faith, yet many people seek the meaning of the number 15 from a numerological perspective.
More about numerology 15 ...
More about numerology 15 ...
№ 15 in other languages
How to say or write the number fifteen in Spanish, German, French and other languages.
| Spanish: | 🔊 (número 15) | quince |
| German: | 🔊 (Nummer 15) | fünfzehn |
| French: | 🔊 (nombre 15) | quinze |
| Portuguese: | 🔊 (número 15) | quinze |
| Hindi: | 🔊 (संख्या 15) | पंद्रह |
| Chinese: | 🔊 (数 15) | 十五 |
| Arabian: | 🔊 (عدد 15) | خمسة عشر |
| Czech: | 🔊 (číslo 15) | patnáct |
| Korean: | 🔊 (번호 15) | 십오 |
| Danish: | 🔊 (nummer 15) | femten |
| Hebrew: | (מספר 15) | חמש עשרה |
| Dutch: | 🔊 (nummer 15) | vijftien |
| Japanese: | 🔊 (数 15) | 十五 |
| Indonesian: | 🔊 (jumlah 15) | lima belas |
| Italian: | 🔊 (numero 15) | quindici |
| Norwegian: | 🔊 (nummer 15) | femten |
| Polish: | 🔊 (liczba 15) | piętnaście |
| Russian: | 🔊 (номер 15) | пятнадцать |
| Turkish: | 🔊 (numara 15) | onbeş |
| Thai: | 🔊 (จำนวน 15) | สิบห้า |
| Ukrainian: | 🔊 (номер 15) | п'ятнадцять |
| Vietnamese: | 🔊 (con số 15) | mười lăm |
| Other languages ... | ||
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Frequently asked questions about the number 15
How do you write the number 15 in words?
15 can be written as "fifteen".
Number 15 in News
| France24: Israel returns 15 Palestinian bodies to Gaza, identifies remains of another hostage
Israel returned the bodies of 15 Palestinians to Gaza on Saturday, bringing the total number handed over to 135, the Gaza health ministry said. Meanwhile, Israel said it had identified the remains of another hostage that Hamas handed over as Eliyahu Margalit, the tenth returned hostage body since the Gaza … Oct. 18, 2025 |
| NyTimes: Over 15 Killed in Gaza City, One Day After Israel Ends Daily Pauses for Aid
One attack was an effort to assassinate Abu Obeida, one of Hamas’s best-known spokesmen, Israeli officials said. It was not immediately clear if that succeeded. Aug. 30, 2025 |
| BBC: Iran drives out 1.5 million Afghans, with some branded spies for Israel
Since a war with Israel in June, Iran has stepped up forcible returns. Some Afghans say they were beaten. July 31, 2025 |
| BBC: At least 15 killed and dozens injured in Russian strike on Kyiv
It is one of the largest bombardments of the capital since the beginning of Russia's full-scale invasion. June 17, 2025 |
| France24: Israeli strikes on Gaza kill 15, says civil defence agency
At least 15 people were killed Saturday in Israeli strikes on Gaza, according to Gaza's civil defence agency. The victims included a couple who were killed with their two young children in a pre-dawn strike in Khan Younis. The strikes came as Israel intensified its military offensive across the Palestinian … May 24, 2025 |