31,998
31,998 is a composite number, even.
Properties
- Parity
- Even
- Digit count
- 5
- Digit sum
- 30
- Digit product
- 1,944
- Digital root
- 3
- Palindrome
- No
- Bit width
- 15 bits
- Reversed
- 89,913
- Recamán's sequence
- a(13,339) = 31,998
- Square (n²)
- 1,023,872,004
- Cube (n³)
- 32,761,856,383,992
- Divisor count
- 8
- σ(n) — sum of divisors
- 64,008
- φ(n) — Euler's totient
- 10,664
- Sum of prime factors
- 5,338
Primality
Prime factorization: 2 × 3 × 5333
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- thirty-one thousand nine hundred ninety-eight
- Ordinal
- 31998th
- Binary
- 111110011111110
- Octal
- 76376
- Hexadecimal
- 0x7CFE
- Base64
- fP4=
- One's complement
- 33,537 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹 𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓂍𓂍𓂍𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵λαϡϟηʹ
- Mayan (base 20)
- 𝋣·𝋳·𝋳·𝋲
- Chinese
- 三萬一千九百九十八
- Chinese (financial)
- 參萬壹仟玖佰玖拾捌
Digit at this position in famous constants
- π — Pi (π)
- Digit 31,998 = 2
- e — Euler's number (e)
- Digit 31,998 = 3
- φ — Golden ratio (φ)
- Digit 31,998 = 7
- √2 — Pythagoras's (√2)
- Digit 31,998 = 1
- ln 2 — Natural log of 2
- Digit 31,998 = 3
- γ — Euler-Mascheroni (γ)
- Digit 31,998 = 2
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 31998, here are decompositions:
- 7 + 31991 = 31998
- 17 + 31981 = 31998
- 41 + 31957 = 31998
- 107 + 31891 = 31998
- 139 + 31859 = 31998
- 149 + 31849 = 31998
- 151 + 31847 = 31998
- 181 + 31817 = 31998
Showing the first eight; more decompositions exist.
UTF-8 encoding: E7 B3 BE (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.124.254.
- Address
- 0.0.124.254
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.124.254
Unspecified address (0.0.0.0/8) — "this network" placeholder.
This passes the ABA routing number checksum and matches the Federal Reserve numbering scheme.
Banks operate many routing numbers per state and division; an unmatched checksum-valid number can still be a real RTN at a smaller institution.
The digit sequence 31998 first appears in π at position 53,884 of the decimal expansion (the 53,884ordinal-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.