131,491
131,491 is a composite number, odd.
131,491 (one hundred thirty-one thousand four hundred ninety-one) is an odd 6-digit number. It is a composite number with 4 divisors, and factors as 23 × 5,717. Written other ways, in hexadecimal, 0x201A3.
Interestingness
Properties
- Parity
- Odd
- Digit count
- 6
- Digit sum
- 19
- Digit product
- 108
- Digital root
- 1
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 194,131
- Recamán's sequence
- a(229,390) = 131,491
- Square (n²)
- 17,289,883,081
- Cube (n³)
- 2,273,464,016,203,771
- Divisor count
- 4
- σ(n) — sum of divisors
- 137,232
- φ(n) — Euler's totient
- 125,752
- Sum of prime factors
- 5,740
Primality
Prime factorization: 23 × 5717
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√131,491 = [362; (1, 1, 1, 1, 1, 1, 3, 2, 1, 7, 9, 1, 2, 28, 1, 1, 1, 55, 8, 24, 1, 7, 1, 1, …)]
Representations
- In words
- one hundred thirty-one thousand four hundred ninety-one
- Ordinal
- 131491st
- Binary
- 100000000110100011
- Octal
- 400643
- Hexadecimal
- 0x201A3
- Base64
- AgGj
- One's complement
- 4,294,835,804 (32-bit)
- Scientific notation
- 1.31491 × 10⁵
- As a duration
- 131,491 s = 1 day, 12 hours, 31 minutes, 31 seconds
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹 𒌋𒌋𒌋𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺
- Greek (Milesian)
- ͵ρλαυϟαʹ
- Mayan (base 20)
- 𝋰·𝋨·𝋮·𝋫
- Chinese
- 一十三萬一千四百九十一
- Chinese (financial)
- 壹拾參萬壹仟肆佰玖拾壹
Also seen as
UTF-8 encoding: F0 A0 86 A3 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.1.163.
- Address
- 0.2.1.163
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.1.163
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 131,491 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 131491 first appears in π at position 161,540 of the decimal expansion (the 161,540ordinal-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
- Egyptian hieroglyphic numerals — Seven hieroglyphs for every power of ten, from a single stroke to a million.