131,431
131,431 is a prime, odd.
131,431 (one hundred thirty-one thousand four hundred thirty-one) is an odd 6-digit number. It is a prime number — divisible only by 1 and itself. Written other ways, in hexadecimal, 0x20167.
Interestingness
Properties
- Parity
- Odd
- Digit count
- 6
- Digit sum
- 13
- Digit product
- 36
- Digital root
- 4
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 134,131
- Recamán's sequence
- a(229,510) = 131,431
- Square (n²)
- 17,274,107,761
- Cube (n³)
- 2,270,353,257,135,991
- Divisor count
- 2
- σ(n) — sum of divisors
- 131,432
- φ(n) — Euler's totient
- 131,430
Primality
131,431 is prime. It has exactly two divisors: 1 and itself.
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√131,431 = [362; (1, 1, 6, 1, 4, 1, 2, 72, 6, 1, 1, 13, 7, 28, 1, 6, 4, 1, 2, 4, 2, 1, 1, 1, …)]
Representations
- In words
- one hundred thirty-one thousand four hundred thirty-one
- Ordinal
- 131431st
- Binary
- 100000000101100111
- Octal
- 400547
- Hexadecimal
- 0x20167
- Base64
- AgFn
- One's complement
- 4,294,835,864 (32-bit)
- Scientific notation
- 1.31431 × 10⁵
- As a duration
- 131,431 s = 1 day, 12 hours, 30 minutes, 31 seconds
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋 𒌋𒌋𒌋𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓏺
- Greek (Milesian)
- ͵ρλαυλαʹ
- Mayan (base 20)
- 𝋰·𝋨·𝋫·𝋫
- Chinese
- 一十三萬一千四百三十一
- Chinese (financial)
- 壹拾參萬壹仟肆佰參拾壹
Also seen as
UTF-8 encoding: F0 A0 85 A7 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.1.103.
- Address
- 0.2.1.103
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.1.103
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 131,431 and was likely granted around 1872.
Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.
The digit sequence 131431 first appears in π at position 505,460 of the decimal expansion (the 505,460ordinal-suffix:th digit after the integer 3).
Search range: the first 1,000,000 fractional digits of π. Any 6-digit-or-shorter string is virtually guaranteed to appear in there — the more interesting signal is the position.
Related reading
- Prime numbers — The building blocks of arithmetic: what primes are, why they matter, and how we find them.
- Egyptian hieroglyphic numerals — Seven hieroglyphs for every power of ten, from a single stroke to a million.