# Number 31 facts

Number 31 spell 🔊, write in words: thirty-one. Ordinal number 31st is said 🔊 and write: thirty-first. Phone prefix +31 or 0031. The meaning of the number 31 in Maths: Is it Prime? Factorization and prime factors tree. The square root and cube root of 31. What is 31 in computer science, numerology, codes and images, writing and naming in other languages. Other interesting facts, videos, news related to 31.

## What is 31 in other units

The decimal (Arabic) number 31 converted to a Roman number is XXXI. Roman and decimal number conversions.
 The number 31 converted to a Mayan number is Decimal and Mayan number conversions.

#### Weight conversion

31 kilograms (kg) = 68.3 pounds (lbs)
31 pounds (lbs) = 14.1 kilograms (kg)

#### Length conversion

31 kilometers (km) equals to 19.263 miles (mi).
31 miles (mi) equals to 49.890 kilometers (km).
31 meters (m) equals to 49.890 feet (ft).
31 feet (ft) equals 9.449 meters (m).
31 centimeters (cm) equals to 12.2 inches (in).
31 inches (in) equals to 78.7 centimeters (cm).

#### Temperature conversion

31° Fahrenheit (°F) equals to -0.6° Celsius (°C)
31° Celsius (°C) equals to 87.8° Fahrenheit (°F)

#### Power conversion

31 Horsepower (hp) equals to 22.80 kilowatts (kW)
31 kilowatts (kW) equals to 42.15 horsepower (hp)

### Codes and images of the number 31

Number 31 morse code: ...-- .----
Sign language for number 31:

Number 31 in braille:
Images of the number
Image (1) of the numberImage (2) of the number
More images, other sizes, codes and colors ...

## Year 31 AD

• Musonius Rufus, Roman philosopher was born.
• Saint Stephen died, by stoning.

### Gregorian, Hebrew, Islamic, Persian and Buddhist Year (Calendar)

Gregorian year 31 is Buddhist year 574.
Buddhist year 31 is Gregorian year 512 a. C.
Gregorian year 31 is Islamic year -609 or -608.
Islamic year 31 is Gregorian year 651 or 652.
Gregorian year 31 is Persian year -592 or -591.
Persian year 31 is Gregorian 652 or 653.
Gregorian year 31 is Hebrew year 3791 or 3792.
Hebrew year 31 is Gregorian year 3729 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.

## Mathematics of no. 31

### Multiplications

#### Multiplication table of 31

31 multiplied by two equals 62 (31 x 2 = 62).
31 multiplied by three equals 93 (31 x 3 = 93).
31 multiplied by four equals 124 (31 x 4 = 124).
31 multiplied by five equals 155 (31 x 5 = 155).
31 multiplied by six equals 186 (31 x 6 = 186).
31 multiplied by seven equals 217 (31 x 7 = 217).
31 multiplied by eight equals 248 (31 x 8 = 248).
31 multiplied by nine equals 279 (31 x 9 = 279).
show multiplications by 6, 7, 8, 9 ...

### Fractions: decimal fraction and common fraction

#### Fraction table of 31

Half of 31 is 15,5 (31 / 2 = 15,5 = 15 1/2).
One third of 31 is 10,3333 (31 / 3 = 10,3333 = 10 1/3).
One quarter of 31 is 7,75 (31 / 4 = 7,75 = 7 3/4).
One fifth of 31 is 6,2 (31 / 5 = 6,2 = 6 1/5).
One sixth of 31 is 5,1667 (31 / 6 = 5,1667 = 5 1/6).
One seventh of 31 is 4,4286 (31 / 7 = 4,4286 = 4 3/7).
One eighth of 31 is 3,875 (31 / 8 = 3,875 = 3 7/8).
One ninth of 31 is 3,4444 (31 / 9 = 3,4444 = 3 4/9).
show fractions by 6, 7, 8, 9 ...

 31

### Advanced math operations

#### Is Prime?

The number 31 is a prime number. The closest prime numbers are 29, 37.
The 31st prime number in order is 127.

#### Factorization and factors (dividers)

The prime factors of 31
Prime numbers have no prime factors smaller than themselves.
The factors of 31 are 1, 31.
Total factors 2.
Sum of factors 32 (1).

#### Prime factor tree

31 is a prime number.

#### Powers

The second power of 312 is 961.
The third power of 313 is 29.791.

#### Roots

The square root √31 is 5,567764.
The cube root of 331 is 3,141381.

#### Logarithms

The natural logarithm of No. ln 31 = loge 31 = 3,433987.
The logarithm to base 10 of No. log10 31 = 1,491362.
The Napierian logarithm of No. log1/e 31 = -3,433987.

### Trigonometric functions

The cosine of 31 is 0,914742.
The sine of 31 is -0,404038.
The tangent of 31 is -0,441696.

### Properties of the number 31

More math properties ...

## Number 31 in Computer Science

Code typeCode value
Unix timeUnix time 31 is equal to Thursday Jan. 1, 1970, 12:31 a.m. GMT
IPv4, IPv6Number 31 internet address in dotted format v4 0.0.0.31, v6 ::1f
31 Decimal = 11111 Binary
31 Decimal = 1011 Ternary
31 Decimal = 37 Octal
31 Decimal = 1F Hexadecimal (0x1f hex)
31 BASE64MzE=
31 MD5c16a5320fa475530d9583c34fd356ef5
31 SHA1632667547e7cd3e0466547863e1207a8c0c0c549
31 SHA224c05730c3a7a2dbef1693c0299929166dd379d9b57a1ddc5024aa2b48
31 SHA256eb1e33e8a81b697b75855af6bfcdbcbf7cbbde9f94962ceaec1ed8af21f5a50f
31 SHA38463eba807c25331f128c471c835447eed6b450dd0b3887234e6810a2ffdbfa30b71c7c286ea35e5e6642827dcf65a7bc8
More SHA codes related to the number 31 ...

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## Numerology 31

### The meaning of the number 3 (three), numerology 3

Character frequency 3: 1

The number three (3) came to share genuine expression and sensitivity with the world. People associated with this number need to connect with their deepest emotions. The number 3 is characterized by its pragmatism, it is utilitarian, sagacious, dynamic, creative, it has objectives and it fulfills them. He/she is also self-expressive in many ways and with good communication skills.
More about the the number 3 (three), numerology 3 ...

### The meaning of the number 1 (one), numerology 1

Character frequency 1: 1

Number one (1) came to develop or balance creativity, independence, originality, self-reliance and confidence in the world. It reflects power, creative strength, quick mind, drive and ambition. It is the sign of individualistic and aggressive nature.
More about the the number 1 (one), numerology 1 ...

## Interesting facts about the number 31

### Asteroids

• (31) Euphrosyne is asteroid number 31. It was discovered by J. Ferguson from Obs. United States Naval on 9/1/1854.

### Areas, mountains and surfaces

• The total area of Berkner Island is 16,939 square miles (43,873 square km). Country None (Antarctic territorial claims by Argentina, Chile (partial) and United Kingdom). 31th largest island in the world.

### Distances between cities

• There is a 31 miles (49 km) direct distance between Bogor (Indonesia) and Tangerang (Indonesia).
• There is a 20 miles (31 km) direct distance between Bucheon-si (South Korea) and Seongnam-si (South Korea).

### Games

• Pokémon Nidoqueen (Nidokuin) is a Pokémon number # 031 of the National Pokédex. Nidoqueen is poison and ground type Pokémon in the first generation. It is an egg group Pokémon None. The indexes ontros of Nidoqueen are Johto index 097 , Kalos Center index 106 - Pokédex Coastal Zone.

### History and politics

• ISO 3166 country codes for Azerbaijan are AZ, AZE, 031 and internet top-level domain is .az
• United Nations Security Council Resolution number 31, adopted 25 August 1947. Committee relating to resolution of the Indonesian National Revolution. Resolution text.

### Mathematics

• 31 is the 5th centered triangular number

Example of 4th centered triangular number with 19 dots.
• 31 is the 4th centered pentagonal number

Example of 4th centered pentagonal number with 31 dots.
• 31 is the earliest and the only known case such that the sum of the divisors of two distinct numbers (16 & 25) is the same prime quantity (31), that is to say: 1+2+4+8+16 = 31 and 1+5+25 = 31
• 31 is the number of minimal composites which cover the set of composites in base 10
• 31 is the smallest prime that is a sum of two triangular numbers with prime indices
• 31 is a Mersenne prime.
• More mathematics ...

### Mobile and telephony

• Number 31 or +31 or 0031 is a dial the international call prefix for Netherlands. (00/+) is dial the international call prefix.

### Science

• Gallium is the chemical element in the periodic table that has the symbol Ga and atomic number 31.

### Sports

• The best athletes to wear number 31
Greg Maddux, MLB; Reggie Miller, NBA; Fergie Jenkins, MLB; Dave Winfield, MLB; Billy Smith, NHL; Mike Piazza, MLB; Donnie Shell, NFL

### Tv, movies and cinematography

• Rob Zombie's 31 Official Trailer #1 (2016) - Sheri Moon Zombie, Malcolm McDowell

## № 31 in other languages

How to say or write the number thirty-one in Spanish, German, French and other languages.
 Spanish: 🔊 (número 31) treinta y uno German: 🔊 (Nummer 31) einunddreißig French: 🔊 (nombre 31) trente et un Portuguese: 🔊 (número 31) trinta e um Hindi: 🔊 (संख्या 31) इकतीस Chinese: 🔊 (数 31) 三十一 Arabian: 🔊 (عدد 31) واحد و ثلاثون Czech: 🔊 (číslo 31) třicet jedna Korean: 🔊 (번호 31) 삼십일 Danish: 🔊 (nummer 31) enogtredive Hebrew: (מספר 31) שלשים ואחת Dutch: 🔊 (nummer 31) eenendertig Japanese: 🔊 (数 31) 三十一 Indonesian: 🔊 (jumlah 31) tiga puluh satu Italian: 🔊 (numero 31) trentuno Norwegian: 🔊 (nummer 31) tretti-en Polish: 🔊 (liczba 31) trzydzieści jeden Russian: 🔊 (номер 31) тридцать один Turkish: 🔊 (numara 31) otuzbir Thai: 🔊 (จำนวน 31) สามสิบเอ็ด Ukrainian: 🔊 (номер 31) тридцять один Vietnamese: 🔊 (con số 31) ba mươi mốt Other languages ...

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## Frequently asked questions about the number 31

• ### Is 31 prime and why?

The number 31 is a prime number because its divisors are: 1, 31.

• ### How do you write the number 31 in words?

31 can be written as "thirty-one".

## Number 31 in News

 The Sydney Morning Herald: Woman reported missing 31 years ago found in Puerto Rico The case had stumped authorities, who later declared the woman legally dead. March 6, 2023 France24: France goes 31 days without rainfall, unprecedented in winter France has matched its record dry spell of 31 days without significant rainfall, the country's weather service said Tuesday, amid concerns over water reserves in parts of Europe still reeling from last year's severe drought. Feb. 21, 2023 BBC: Thailand warship capsizes leaving 31 sailors missing The navy is searching for survivors after the HTMS Sukhothai, carrying 106 crew, sank in a storm. Dec. 19, 2022 NyTimes: Royal Thai Navy Scrambles to Rescue 31 After Its Ship Sinks Officials said that the HTMS Sukhothai took on water, lost power and eventually sank in the Gulf of Thailand overnight. Dec. 19, 2022 The Sydney Morning Herald: ‘Heartbreaking’: Three mass shootings in US during Easter weekend leave two dead The South Carolina shootings and one in Pittsburgh, in which two minors were killed early Sunday, also left at least 31 people wounded. April 18, 2022