131,918
131,918 is a composite number, even.
131,918 (one hundred thirty-one thousand nine hundred eighteen) is an even 6-digit number. It is a composite number with 8 divisors, and factors as 2 × 71 × 929. Written other ways, in hexadecimal, 0x2034E.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 23
- Digit product
- 216
- Digital root
- 5
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 819,131
- Recamán's sequence
- a(228,536) = 131,918
- Square (n²)
- 17,402,358,724
- Cube (n³)
- 2,295,684,358,152,632
- Divisor count
- 8
- σ(n) — sum of divisors
- 200,880
- φ(n) — Euler's totient
- 64,960
- Sum of prime factors
- 1,002
Primality
Prime factorization: 2 × 71 × 929
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√131,918 = [363; (4, 1, 6, 1, 12, 1, 5, 38, 15, 1, 3, 3, 1, 4, 1, 3, 1, 1, 4, 1, 1, 3, 1, 4, …)]
Period length 38 — the block in parentheses repeats forever.
Representations
- In words
- one hundred thirty-one thousand nine hundred eighteen
- Ordinal
- 131918th
- Binary
- 100000001101001110
- Octal
- 401516
- Hexadecimal
- 0x2034E
- Base64
- AgNO
- One's complement
- 4,294,835,377 (32-bit)
- Scientific notation
- 1.31918 × 10⁵
- As a duration
- 131,918 s = 1 day, 12 hours, 38 minutes, 38 seconds
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵ρλαϡιηʹ
- Mayan (base 20)
- 𝋰·𝋩·𝋯·𝋲
- Chinese
- 一十三萬一千九百一十八
- Chinese (financial)
- 壹拾參萬壹仟玖佰壹拾捌
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 131918, here are decompositions:
- 19 + 131899 = 131918
- 79 + 131839 = 131918
- 139 + 131779 = 131918
- 211 + 131707 = 131918
- 277 + 131641 = 131918
- 307 + 131611 = 131918
- 337 + 131581 = 131918
- 421 + 131497 = 131918
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A0 8D 8E (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.3.78.
- Address
- 0.2.3.78
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.3.78
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 131,918 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 131918 first appears in π at position 860,155 of the decimal expansion (the 860,155ordinal-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
- Mayan numerals — Vigesimal dots-and-bars with a shell zero — one of the earliest true zeros.