13,138
13,138 is a composite number, even.
Properties
- Parity
- Even
- Digit count
- 5
- Digit sum
- 16
- Digit product
- 72
- Digital root
- 7
- Palindrome
- No
- Bit width
- 14 bits
- Reversed
- 83,131
- Recamán's sequence
- a(47,999) = 13,138
- Square (n²)
- 172,607,044
- Cube (n³)
- 2,267,711,344,072
- Divisor count
- 4
- σ(n) — sum of divisors
- 19,710
- φ(n) — Euler's totient
- 6,568
- Sum of prime factors
- 6,571
Primality
Prime factorization: 2 × 6569
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- thirteen thousand one hundred thirty-eight
- Ordinal
- 13138th
- Binary
- 11001101010010
- Octal
- 31522
- Hexadecimal
- 0x3352
- Base64
- M1I=
- One's complement
- 52,397 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓂍𓆼𓆼𓆼𓍢𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵ιγρληʹ
- Mayan (base 20)
- 𝋡·𝋬·𝋰·𝋲
- Chinese
- 一萬三千一百三十八
- Chinese (financial)
- 壹萬參仟壹佰參拾捌
Digit at this position in famous constants
- π — Pi (π)
- Digit 13,138 = 1
- e — Euler's number (e)
- Digit 13,138 = 0
- φ — Golden ratio (φ)
- Digit 13,138 = 8
- √2 — Pythagoras's (√2)
- Digit 13,138 = 3
- ln 2 — Natural log of 2
- Digit 13,138 = 1
- γ — Euler-Mascheroni (γ)
- Digit 13,138 = 9
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 13138, here are decompositions:
- 11 + 13127 = 13138
- 17 + 13121 = 13138
- 29 + 13109 = 13138
- 89 + 13049 = 13138
- 101 + 13037 = 13138
- 131 + 13007 = 13138
- 137 + 13001 = 13138
- 179 + 12959 = 13138
Showing the first eight; more decompositions exist.
UTF-8 encoding: E3 8D 92 (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.51.82.
- Address
- 0.0.51.82
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.51.82
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 13138 first appears in π at position 14,956 of the decimal expansion (the 14,956ordinal-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.