131,438
131,438 is a composite number, even.
131,438 (one hundred thirty-one thousand four hundred thirty-eight) is an even 6-digit number. It is a composite number with 4 divisors, and factors as 2 × 65,719. Written other ways, in hexadecimal, 0x2016E.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 20
- Digit product
- 288
- Digital root
- 2
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 834,131
- Recamán's sequence
- a(229,496) = 131,438
- Square (n²)
- 17,275,947,844
- Cube (n³)
- 2,270,716,032,719,672
- Divisor count
- 4
- σ(n) — sum of divisors
- 197,160
- φ(n) — Euler's totient
- 65,718
- Sum of prime factors
- 65,721
Primality
Prime factorization: 2 × 65719
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√131,438 = [362; (1, 1, 5, 4, 1, 3, 1, 1, 1, 3, 1, 2, 1, 1, 1, 6, 1, 5, 3, 1, 1, 1, 2, 17, …)]
Representations
- In words
- one hundred thirty-one thousand four hundred thirty-eight
- Ordinal
- 131438th
- Binary
- 100000000101101110
- Octal
- 400556
- Hexadecimal
- 0x2016E
- Base64
- AgFu
- One's complement
- 4,294,835,857 (32-bit)
- Scientific notation
- 1.31438 × 10⁵
- As a duration
- 131,438 s = 1 day, 12 hours, 30 minutes, 38 seconds
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵ρλαυληʹ
- Mayan (base 20)
- 𝋰·𝋨·𝋫·𝋲
- Chinese
- 一十三萬一千四百三十八
- Chinese (financial)
- 壹拾參萬壹仟肆佰參拾捌
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 131438, here are decompositions:
- 7 + 131431 = 131438
- 67 + 131371 = 131438
- 127 + 131311 = 131438
- 337 + 131101 = 131438
- 367 + 131071 = 131438
- 379 + 131059 = 131438
- 397 + 131041 = 131438
- 457 + 130981 = 131438
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A0 85 AE (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.1.110.
- Address
- 0.2.1.110
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.1.110
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 131,438 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 131438 first appears in π at position 367,140 of the decimal expansion (the 367,140ordinal-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.