131,408
131,408 is a composite number, even.
131,408 (one hundred thirty-one thousand four hundred eight) is an even 6-digit number. It is a composite number with 20 divisors, and factors as 2⁴ × 43 × 191. Written other ways, in hexadecimal, 0x20150.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 17
- Digit product
- 0
- Digital root
- 8
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 804,131
- Recamán's sequence
- a(229,556) = 131,408
- Square (n²)
- 17,268,062,464
- Cube (n³)
- 2,269,161,552,269,312
- Divisor count
- 20
- σ(n) — sum of divisors
- 261,888
- φ(n) — Euler's totient
- 63,840
- Sum of prime factors
- 242
Primality
Prime factorization: 2 4 × 43 × 191
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√131,408 = [362; (1, 1, 103, 13, 1, 13, 1, 6, 1, 1, 5, 1, 1, 3, 1, 2, 1, 41, 1, 10, 2, 1, 5, 2, …)]
Representations
- In words
- one hundred thirty-one thousand four hundred eight
- Ordinal
- 131408th
- Binary
- 100000000101010000
- Octal
- 400520
- Hexadecimal
- 0x20150
- Base64
- AgFQ
- One's complement
- 4,294,835,887 (32-bit)
- Scientific notation
- 1.31408 × 10⁵
- As a duration
- 131,408 s = 1 day, 12 hours, 30 minutes, 8 seconds
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋 𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓍢𓍢𓍢𓍢𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵ρλαυηʹ
- Mayan (base 20)
- 𝋰·𝋨·𝋪·𝋨
- Chinese
- 一十三萬一千四百零八
- Chinese (financial)
- 壹拾參萬壹仟肆佰零捌
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 131408, here are decompositions:
- 37 + 131371 = 131408
- 97 + 131311 = 131408
- 157 + 131251 = 131408
- 307 + 131101 = 131408
- 337 + 131071 = 131408
- 349 + 131059 = 131408
- 367 + 131041 = 131408
- 397 + 131011 = 131408
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A0 85 90 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.1.80.
- Address
- 0.2.1.80
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.1.80
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 131,408 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 131408 first appears in π at position 434,551 of the decimal expansion (the 434,551ordinal-suffix:st 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.