31,990
31,990 is a composite number, even.
Properties
- Parity
- Even
- Digit count
- 5
- Digit sum
- 22
- Digit product
- 0
- Digital root
- 4
- Palindrome
- No
- Bit width
- 15 bits
- Reversed
- 9,913
- Recamán's sequence
- a(13,355) = 31,990
- Square (n²)
- 1,023,360,100
- Cube (n³)
- 32,737,289,599,000
- Divisor count
- 16
- σ(n) — sum of divisors
- 65,952
- φ(n) — Euler's totient
- 10,944
- Sum of prime factors
- 471
Primality
Prime factorization: 2 × 5 × 7 × 457
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- thirty-one thousand nine hundred ninety
- Ordinal
- 31990th
- Binary
- 111110011110110
- Octal
- 76366
- Hexadecimal
- 0x7CF6
- Base64
- fPY=
- One's complement
- 33,545 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹 𒌋
- Egyptian hieroglyphic
- 𓂍𓂍𓂍𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆
- Greek (Milesian)
- ͵λαϡϟʹ
- Mayan (base 20)
- 𝋣·𝋳·𝋳·𝋪
- Chinese
- 三萬一千九百九十
- Chinese (financial)
- 參萬壹仟玖佰玖拾
Digit at this position in famous constants
- π — Pi (π)
- Digit 31,990 = 5
- e — Euler's number (e)
- Digit 31,990 = 9
- φ — Golden ratio (φ)
- Digit 31,990 = 6
- √2 — Pythagoras's (√2)
- Digit 31,990 = 1
- ln 2 — Natural log of 2
- Digit 31,990 = 0
- γ — Euler-Mascheroni (γ)
- Digit 31,990 = 8
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 31990, here are decompositions:
- 17 + 31973 = 31990
- 83 + 31907 = 31990
- 107 + 31883 = 31990
- 131 + 31859 = 31990
- 173 + 31817 = 31990
- 191 + 31799 = 31990
- 197 + 31793 = 31990
- 239 + 31751 = 31990
Showing the first eight; more decompositions exist.
UTF-8 encoding: E7 B3 B6 (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.124.246.
- Address
- 0.0.124.246
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.124.246
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 31990 first appears in π at position 5,249 of the decimal expansion (the 5,249ordinal-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.