Number 231 facts

The odd number 231 is spelled 🔊, and written in words: two hundred and thirty-one. The ordinal number 231st is said 🔊 and written as: two hundred and thirty-first. Phone prefix +231 or 00231. The meaning of the number 231 in Maths: Is it Prime? Factorization and prime factors tree. The square root and cube root of 231. What is 231 in computer science, numerology, codes and images, writing and naming in other languages. Other interesting facts related to 231.

Interesting facts about the number 231


  • (231) Vindobona is asteroid number 231. It was discovered by J. Palisa from Vienna Observatory on 9/10/1882.

Areas, mountains and surfaces

  • The total area of Geographical Society Island is 663 square miles (1,717 square km). Country Greenland, forms part of the Danish Realm (Denmark). 231th largest island in the world.

Distances between cities

  • There is a 144 miles (231 km) direct distance between Anyang (China) and Luoyang (China).
  • There is a 231 miles (371 km) direct distance between Baoding (China) and Qinhuangdao (China).
  • There is a 144 miles (231 km) direct distance between Benin City (Nigeria) and Port Harcourt (Nigeria).


  • The food additive E-231 O-pheniphenol of chemical origin is classified as a preservative. According to some websites the additive E-231 is considered dangerous.


  • Pokémon Phanpy (Gomazō, Gomazou) is a Pokémon number # 231 of the National Pokédex. Phanpy is a ground-type Pokémon in the second generation. It is a Field Egg group Pokémon. The indexes ontros of Phanpy are Hoenn index 165 , Johto index 195 .

History and politics

  • ISO 3166 country codes for Ethiopia are ET, ETH, 231 and internet top-level domain is .et
  • United Nations Security Council Resolution number 231, adopted 15 December 1966. Extending the mandate of the United Nations Peacekeeping Force in Cyprus. Resolution text.

In other fields

  • U.S. liquid gallon is legally defined as 231 cubic inches


  • 231 is the smallest triangular number in which the sum of the external digits equals the sum of the internal digits
  • 231 is the number of partitions of 16.

Mobile and telephony

  • 231 is an area code for Muskegon, Michigan (MI), USA, according to the North American Numbering Plan.
  • Number 231 or +231 or 00231 is a dial the international call prefix for Liberia. (00/+) is dial the international call prefix.


  • Pacific 231, an orchestral work by French composer Arthur Honegger.

Tv, movies and cinematography

  • Pacific 231, a 1949 short film directed by Jean Mitry.

What is 231 in other units

The decimal (Arabic) number 231 converted to a Roman number is CCXXXI. Roman and decimal number conversions.
The number 231 converted to a Mayan number is mayan number 231
Decimal and Mayan number conversions.

Weight conversion

231 kilograms (kg) = 509.3 pounds (lbs)
231 pounds (lbs) = 104.8 kilograms (kg)

Length conversion

231 kilometers (km) equals to 143.537 miles (mi).
231 miles (mi) equals to 371.759 kilometers (km).
231 meters (m) equals to 371.759 feet (ft).
231 feet (ft) equals 70.410 meters (m).
231 centimeters (cm) equals to 90.9 inches (in).
231 inches (in) equals to 586.7 centimeters (cm).

Temperature conversion

231° Fahrenheit (°F) equals to 110.6° Celsius (°C)
231° Celsius (°C) equals to 447.8° Fahrenheit (°F)

Power conversion

231 Horsepower (hp) equals to 169.88 kilowatts (kW)
231 kilowatts (kW) equals to 314.12 horsepower (hp)

Time conversion

(hours, minutes, seconds, days, weeks)
231 seconds equals to 3 minutes, 51 seconds
231 minutes equals to 3 hours, 51 minutes

Codes and images of the number 231

Number 231 morse code: ..--- ...-- .----
Sign language for number 231:
Sign language for number 231 Sign language for number 231 Sign language for number 231
Number 231 in braille:
Number 231 in braille
Images of the number
Image (1) of the numberImage (2) of the number
Number 231 black image Number 231 red image
More images, other sizes, codes and colors ...

Number 231 infographic

Year 231 AD

Origen, disciple of Ammonius Saccas, founder of Neoplatonism , was exiled in Caesarea.

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

Gregorian year 231 is Buddhist year 774.
Buddhist year 231 is Gregorian year 312 a. C.
Gregorian year 231 is Islamic year -403 or -402.
Islamic year 231 is Gregorian year 845 or 846.
Gregorian year 231 is Persian year -392 or -391.
Persian year 231 is Gregorian 852 or 853.
Gregorian year 231 is Hebrew year 3991 or 3992.
Hebrew year 231 is Gregorian year 3529 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 231 is not a prime number. The closest prime numbers are 229, 233.
The 231st prime number in order is 1453.

Factorization and factors (dividers)

The prime factors of 231 are 3 * 7 * 11
The factors of 231 are 1, 3, 7, 11, 21, 33, 77, 231.
Total factors 8.
Sum of factors 384 (153).

Prime factor tree


The second power of 2312 is 53.361.
The third power of 2313 is 12.326.391.


The square root √231 is 15,198684.
The cube root of 3231 is 6,135792.


The natural logarithm of No. ln 231 = loge 231 = 5,442418.
The logarithm to base 10 of No. log10 231 = 2,363612.
The Napierian logarithm of No. log1/e 231 = -5,442418.

Trigonometric functions

The cosine of 231 is 0,092806.
The sine of 231 is -0,995684.
The tangent of 231 is -10,728637.

Number 231 in Computer Science

Code typeCode value
(Miscellaneous HTML entities)
Unix timeUnix time 231 is equal to Thursday Jan. 1, 1970, 12:03:51 a.m. GMT
IPv4, IPv6Number 231 internet address in dotted format v4, v6 ::e7
231 Decimal = 11100111 Binary
231 Decimal = 22120 Ternary
231 Decimal = 347 Octal
231 Decimal = E7 Hexadecimal (0xe7 hex)
231 BASE64MjMx
231 MD59b04d152845ec0a378394003c96da594
231 SHA1eadc1dd8fc279583d5552700ae5d248e3fa123bd
231 SHA224356f8d3a94dcef9c0b3a18dc151d9c2767bc7cf55627eca7b361f15b
231 SHA256138d9e809e386a7b800791d1f664f56d1c55f3d1ba411b950862729bc486c5ce
231 SHA38410e73815e9db5597e390c9abade7dff61260039662f13d899ed03ff37048a0edb23f1ae35b784e580c8e2fe394f0a6bc
More SHA codes related to the number 231 ...

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Numerology 231

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 2 (two), numerology 2

Character frequency 2: 1

The number two (2) needs above all to feel and to be. It represents the couple, duality, family, private and social life. He/she really enjoys home life and family gatherings. The number 2 denotes a sociable, hospitable, friendly, caring and affectionate person. It is the sign of empathy, cooperation, adaptability, consideration for others, super-sensitivity towards the needs of others.

The number 2 (two) is also the symbol of balance, togetherness and receptivity. He/she is a good partner, colleague or companion; he/she also plays a wonderful role as a referee or mediator. Number 2 person is modest, sincere, spiritually influenced and a good diplomat. It represents intuition and vulnerability.
More about the the number 2 (two), numerology 2 ...

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 ...

№ 231 in other languages

How to say or write the number two hundred and thirty-one in Spanish, German, French and other languages.
Spanish: 🔊 (número 231)

doscientos treinta y uno

German: 🔊 (Nummer 231)


French: 🔊 (nombre 231)

deux cent trente et un

Portuguese: 🔊 (número 231)

duzentos e trinta e um

Hindi: 🔊 (संख्या 231)

दो सौ, इकतीस

Chinese: 🔊 (数 231)


Arabian: 🔊 (عدد 231)

مئتان و واحد و ثلاثون

Czech: 🔊 (číslo 231)

dvěstě třicet jedna

Korean: 🔊 (번호 231)


Danish: 🔊 (nummer 231)

tohundrede og enogtredive

Hebrew: (מספר 231)

מאתיים שלושים ואחת

Dutch: 🔊 (nummer 231)


Japanese: 🔊 (数 231)


Indonesian: 🔊 (jumlah 231)

dua ratus tiga puluh satu

Italian: 🔊 (numero 231)


Norwegian: 🔊 (nummer 231)

to hundre og trettien

Polish: 🔊 (liczba 231)

dwieście trzydzieści jeden

Russian: 🔊 (номер 231)

двести тридцать один

Turkish: 🔊 (numara 231)


Thai: 🔊 (จำนวน 231)


Ukrainian: 🔊 (номер 231)

двісті тридцять один

Vietnamese: 🔊 (con số 231)

hai trăm ba mươi mốt

Other languages ...

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Frequently asked questions about the number 231

  • How do you write the number 231 in words?

    231 can be written as "two hundred and thirty-one".

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