131,540
131,540 is a composite number, even.
131,540 (one hundred thirty-one thousand five hundred forty) is an even 6-digit number. It is a composite number with 12 divisors, and factors as 2² × 5 × 6,577. Its proper divisors sum to 144,736, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x201D4.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 14
- Digit product
- 0
- Digital root
- 5
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 45,131
- Recamán's sequence
- a(229,292) = 131,540
- Square (n²)
- 17,302,771,600
- Cube (n³)
- 2,276,006,576,264,000
- Divisor count
- 12
- σ(n) — sum of divisors
- 276,276
- φ(n) — Euler's totient
- 52,608
- Sum of prime factors
- 6,586
Primality
Prime factorization: 2 2 × 5 × 6577
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√131,540 = [362; (1, 2, 5, 1, 11, 2, 4, 1, 2, 1, 4, 1, 3, 1, 44, 1, 1, 5, 2, 1, 9, 1, 1, 7, …)]
Representations
- In words
- one hundred thirty-one thousand five hundred forty
- Ordinal
- 131540th
- Binary
- 100000000111010100
- Octal
- 400724
- Hexadecimal
- 0x201D4
- Base64
- AgHU
- One's complement
- 4,294,835,755 (32-bit)
- Scientific notation
- 1.3154 × 10⁵
- As a duration
- 131,540 s = 1 day, 12 hours, 32 minutes, 20 seconds
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹 𒌋𒌋
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆
- Greek (Milesian)
- ͵ρλαφμʹ
- Mayan (base 20)
- 𝋰·𝋨·𝋱·𝋠
- Chinese
- 一十三萬一千五百四十
- Chinese (financial)
- 壹拾參萬壹仟伍佰肆拾
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 131540, here are decompositions:
- 43 + 131497 = 131540
- 61 + 131479 = 131540
- 103 + 131437 = 131540
- 109 + 131431 = 131540
- 127 + 131413 = 131540
- 223 + 131317 = 131540
- 229 + 131311 = 131540
- 337 + 131203 = 131540
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A0 87 94 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.1.212.
- Address
- 0.2.1.212
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.1.212
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 131,540 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.