13,220
13,220 is a composite number, even.
Properties
- Parity
- Even
- Digit count
- 5
- Digit sum
- 8
- Digit product
- 0
- Digital root
- 8
- Palindrome
- No
- Bit width
- 14 bits
- Reversed
- 2,231
- Recamán's sequence
- a(47,835) = 13,220
- Square (n²)
- 174,768,400
- Cube (n³)
- 2,310,438,248,000
- Divisor count
- 12
- σ(n) — sum of divisors
- 27,804
- φ(n) — Euler's totient
- 5,280
- Sum of prime factors
- 670
Primality
Prime factorization: 2 2 × 5 × 661
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- thirteen thousand two hundred twenty
- Ordinal
- 13220th
- Binary
- 11001110100100
- Octal
- 31644
- Hexadecimal
- 0x33A4
- Base64
- M6Q=
- One's complement
- 52,315 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹 𒌋𒌋𒌋𒌋 𒌋𒌋
- Egyptian hieroglyphic
- 𓂍𓆼𓆼𓆼𓍢𓍢𓎆𓎆
- Greek (Milesian)
- ͵ιγσκʹ
- Mayan (base 20)
- 𝋡·𝋭·𝋡·𝋠
- Chinese
- 一萬三千二百二十
- Chinese (financial)
- 壹萬參仟貳佰貳拾
Digit at this position in famous constants
- π — Pi (π)
- Digit 13,220 = 2
- e — Euler's number (e)
- Digit 13,220 = 5
- φ — Golden ratio (φ)
- Digit 13,220 = 2
- √2 — Pythagoras's (√2)
- Digit 13,220 = 3
- ln 2 — Natural log of 2
- Digit 13,220 = 6
- γ — Euler-Mascheroni (γ)
- Digit 13,220 = 5
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 13220, here are decompositions:
- 3 + 13217 = 13220
- 37 + 13183 = 13220
- 43 + 13177 = 13220
- 61 + 13159 = 13220
- 73 + 13147 = 13220
- 127 + 13093 = 13220
- 157 + 13063 = 13220
- 211 + 13009 = 13220
Showing the first eight; more decompositions exist.
UTF-8 encoding: E3 8E A4 (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.51.164.
- Address
- 0.0.51.164
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.51.164
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 13220 first appears in π at position 89,903 of the decimal expansion (the 89,903ordinal-suffix:rd 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.