131,730
131,730 is a composite number, even.
131,730 (one hundred thirty-one thousand seven hundred thirty) is an even 6-digit number. It is a composite number with 16 divisors, and factors as 2 × 3 × 5 × 4,391. Its proper divisors sum to 184,494, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x20292.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 15
- Digit product
- 0
- Digital root
- 6
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 37,131
- Recamán's sequence
- a(228,912) = 131,730
- Square (n²)
- 17,352,792,900
- Cube (n³)
- 2,285,883,408,717,000
- Divisor count
- 16
- σ(n) — sum of divisors
- 316,224
- φ(n) — Euler's totient
- 35,120
- Sum of prime factors
- 4,401
Primality
Prime factorization: 2 × 3 × 5 × 4391
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√131,730 = [362; (1, 17, 1, 1, 1, 1, 2, 3, 1, 10, 4, 2, 2, 2, 7, 1, 2, 1, 6, 5, 1, 5, 1, 2, …)]
Representations
- In words
- one hundred thirty-one thousand seven hundred thirty
- Ordinal
- 131730th
- Binary
- 100000001010010010
- Octal
- 401222
- Hexadecimal
- 0x20292
- Base64
- AgKS
- One's complement
- 4,294,835,565 (32-bit)
- Scientific notation
- 1.3173 × 10⁵
- As a duration
- 131,730 s = 1 day, 12 hours, 35 minutes, 30 seconds
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆
- Greek (Milesian)
- ͵ρλαψλʹ
- Mayan (base 20)
- 𝋰·𝋩·𝋦·𝋪
- Chinese
- 一十三萬一千七百三十
- Chinese (financial)
- 壹拾參萬壹仟柒佰參拾
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 131730, here are decompositions:
- 17 + 131713 = 131730
- 19 + 131711 = 131730
- 23 + 131707 = 131730
- 29 + 131701 = 131730
- 43 + 131687 = 131730
- 59 + 131671 = 131730
- 89 + 131641 = 131730
- 103 + 131627 = 131730
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A0 8A 92 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.2.146.
- Address
- 0.2.2.146
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.2.146
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 131,730 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 131730 first appears in π at position 798,060 of the decimal expansion (the 798,060ordinal-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
- Babylonian numerals — The base-60 cuneiform system that gave us 60 minutes, 60 seconds, and 360°.