131,981
131,981 is a composite number, odd.
131,981 (one hundred thirty-one thousand nine hundred eighty-one) is an odd 6-digit number. It is a composite number with 4 divisors, and factors as 191 × 691. Written other ways, in hexadecimal, 0x2038D.
Interestingness
Properties
- Parity
- Odd
- Digit count
- 6
- Digit sum
- 23
- Digit product
- 216
- Digital root
- 5
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 189,131
- Recamán's sequence
- a(228,410) = 131,981
- Square (n²)
- 17,418,984,361
- Cube (n³)
- 2,298,974,974,949,141
- Divisor count
- 4
- σ(n) — sum of divisors
- 132,864
- φ(n) — Euler's totient
- 131,100
- Sum of prime factors
- 882
Primality
Prime factorization: 191 × 691
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√131,981 = [363; (3, 2, 2, 1, 6, 1, 15, 1, 1, 1, 4, 36, 8, 1, 2, 1, 1, 1, 8, 1, 12, 3, 5, 1, …)]
Representations
- In words
- one hundred thirty-one thousand nine hundred eighty-one
- Ordinal
- 131981st
- Binary
- 100000001110001101
- Octal
- 401615
- Hexadecimal
- 0x2038D
- Base64
- AgON
- One's complement
- 4,294,835,314 (32-bit)
- Scientific notation
- 1.31981 × 10⁵
- As a duration
- 131,981 s = 1 day, 12 hours, 39 minutes, 41 seconds
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺
- Greek (Milesian)
- ͵ρλαϡπαʹ
- Mayan (base 20)
- 𝋰·𝋩·𝋳·𝋡
- Chinese
- 一十三萬一千九百八十一
- Chinese (financial)
- 壹拾參萬壹仟玖佰捌拾壹
Also seen as
UTF-8 encoding: F0 A0 8E 8D (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.3.141.
- Address
- 0.2.3.141
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.3.141
Unspecified address (0.0.0.0/8) — "this network" placeholder.
This number falls in the range of US utility patent numbers. If it's a patent, it would be issued as US 131,981 and was likely granted around 1872.
Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.
Related reading
- Mayan numerals — Vigesimal dots-and-bars with a shell zero — one of the earliest true zeros.