138,222
138,222 is a composite number, even.
138,222 (one hundred thirty-eight thousand two hundred twenty-two) is an even 6-digit number. It is a composite number with 24 divisors, and factors as 2 × 3² × 7 × 1,097. Its proper divisors sum to 204,354, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x21BEE.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 18
- Digit product
- 192
- Digital root
- 9
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 222,831
- Recamán's sequence
- a(492,383) = 138,222
- Square (n²)
- 19,105,321,284
- Cube (n³)
- 2,640,775,718,517,048
- Divisor count
- 24
- σ(n) — sum of divisors
- 342,576
- φ(n) — Euler's totient
- 39,456
- Sum of prime factors
- 1,112
Primality
Prime factorization: 2 × 3 2 × 7 × 1097
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√138,222 = [371; (1, 3, 1, 1, 2, 4, 5, 1, 6, 1, 1, 10, 1, 1, 3, 2, 2, 3, 15, 1, 1, 8, 1, 1, …)]
Period length 52 — the block in parentheses repeats forever.
Representations
- In words
- one hundred thirty-eight thousand two hundred twenty-two
- Ordinal
- 138222nd
- Binary
- 100001101111101110
- Octal
- 415756
- Hexadecimal
- 0x21BEE
- Base64
- Ahvu
- One's complement
- 4,294,829,073 (32-bit)
- Scientific notation
- 1.38222 × 10⁵
- As a duration
- 138,222 s = 1 day, 14 hours, 23 minutes, 42 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓎆𓎆𓏺𓏺
- Greek (Milesian)
- ͵ρλησκβʹ
- Mayan (base 20)
- 𝋱·𝋥·𝋫·𝋢
- Chinese
- 一十三萬八千二百二十二
- Chinese (financial)
- 壹拾參萬捌仟貳佰貳拾貳
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 138222, here are decompositions:
- 13 + 138209 = 138222
- 31 + 138191 = 138222
- 41 + 138181 = 138222
- 43 + 138179 = 138222
- 59 + 138163 = 138222
- 79 + 138143 = 138222
- 83 + 138139 = 138222
- 109 + 138113 = 138222
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A1 AF AE (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.27.238.
- Address
- 0.2.27.238
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.27.238
Unspecified address (0.0.0.0/8) — "this network" placeholder.
This number falls in the range of US utility patent numbers. If it's a patent, it would be issued as US 138,222 and was likely granted around 1872.
Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.
Related reading
- Babylonian numerals — The base-60 cuneiform system that gave us 60 minutes, 60 seconds, and 360°.