2,222
2,222 is a composite number, even.
2,222 (two thousand two hundred twenty-two) is an even 4-digit number. It is a composite number with 8 divisors, and factors as 2 × 11 × 101. Its digits read the same forwards and backwards, so it is a palindromic number. Written other ways, in Roman numerals it is MMCCXXII and in binary, 100010101110.
Interestingness
Properties
- Parity
- Even
- Digit count
- 4
- Digit sum
- 8
- Digit product
- 16
- Digital root
- 8
- Palindrome
- Yes
- Bit width
- 12 bits
- Recamán's sequence
- a(3,307) = 2,222
- Square (n²)
- 4,937,284
- Cube (n³)
- 10,970,645,048
- Divisor count
- 8
- σ(n) — sum of divisors
- 3,672
- φ(n) — Euler's totient
- 1,000
- Sum of prime factors
- 114
Primality
Prime factorization: 2 × 11 × 101
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√2,222 = [47; (7, 4, 7, 94)]
Period length 4 — the block in parentheses repeats forever.
Representations
- In words
- two thousand two hundred twenty-two
- Ordinal
- 2222nd
- Roman numeral
- MMCCXXII
- Binary
- 100010101110
- Octal
- 4256
- Hexadecimal
- 0x8AE
- Base64
- CK4=
- One's complement
- 63,313 (16-bit)
- Scientific notation
- 2.222 × 10³
- As a duration
- 2,222 s = 37 minutes, 2 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒁹𒁹
- Egyptian hieroglyphic
- 𓆼𓆼𓍢𓍢𓎆𓎆𓏺𓏺
- Greek (Milesian)
- ͵βσκβʹ
- Mayan (base 20)
- 𝋥·𝋫·𝋢
- Chinese
- 二千二百二十二
- Chinese (financial)
- 貳仟貳佰貳拾貳
Digit at this position in famous constants
- π — Pi (π)
- Digit 2,222 = 8
- e — Euler's number (e)
- Digit 2,222 = 7
- φ — Golden ratio (φ)
- Digit 2,222 = 9
- √2 — Pythagoras's (√2)
- Digit 2,222 = 4
- ln 2 — Natural log of 2
- Digit 2,222 = 2
- γ — Euler-Mascheroni (γ)
- Digit 2,222 = 2
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 2222, here are decompositions:
- 19 + 2203 = 2222
- 43 + 2179 = 2222
- 61 + 2161 = 2222
- 79 + 2143 = 2222
- 109 + 2113 = 2222
- 139 + 2083 = 2222
- 193 + 2029 = 2222
- 211 + 2011 = 2222
Showing the first eight; more decompositions exist.
UTF-8 encoding: E0 A2 AE (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.8.174.
- Address
- 0.0.8.174
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.8.174
Unspecified address (0.0.0.0/8) — "this network" placeholder.
Heard as a frequency, 2,222 Hz is closest to:
- Concert pitch (A4 = 440 Hz): C♯7 (2217.5 Hz, +4¢)
- Scientific pitch (C4 = 256 Hz): C♯7 (2169.8 Hz, +41¢)
- Baroque pitch (A4 = 415 Hz): D7 (2215.8 Hz, +5¢)
The digit sequence 2222 first appears in π at position 4,902 of the decimal expansion (the 4,902ordinal-suffix:nd 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
- Mayan numerals — Vigesimal dots-and-bars with a shell zero — one of the earliest true zeros.