155,144
155,144 is a composite number, even.
155,144 (one hundred fifty-five thousand one hundred forty-four) is an even 6-digit number. It is a composite number with 32 divisors, and factors as 2³ × 11 × 41 × 43. Its proper divisors sum to 177,496, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x25E08.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 20
- Digit product
- 400
- Digital root
- 2
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 441,551
- Recamán's sequence
- a(477,831) = 155,144
- Square (n²)
- 24,069,660,736
- Cube (n³)
- 3,734,263,445,225,984
- Divisor count
- 32
- σ(n) — sum of divisors
- 332,640
- φ(n) — Euler's totient
- 67,200
- Sum of prime factors
- 101
Primality
Prime factorization: 2 3 × 11 × 41 × 43
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√155,144 = [393; (1, 7, 1, 1, 3, 2, 2, 3, 1, 5, 1, 1, 2, 1, 1, 1, 3, 31, 4, 4, 98, 4, 4, 31, …)]
Period length 42 — the block in parentheses repeats forever.
Representations
- In words
- one hundred fifty-five thousand one hundred forty-four
- Ordinal
- 155144th
- Binary
- 100101111000001000
- Octal
- 457010
- Hexadecimal
- 0x25E08
- Base64
- Al4I
- One's complement
- 4,294,812,151 (32-bit)
- Scientific notation
- 1.55144 × 10⁵
- As a duration
- 155,144 s = 1 day, 19 hours, 5 minutes, 44 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒌋𒁹𒁹𒁹 𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓍢𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵ρνερμδʹ
- Mayan (base 20)
- 𝋳·𝋧·𝋱·𝋤
- Chinese
- 一十五萬五千一百四十四
- Chinese (financial)
- 壹拾伍萬伍仟壹佰肆拾肆
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 155144, here are decompositions:
- 7 + 155137 = 155144
- 61 + 155083 = 155144
- 97 + 155047 = 155144
- 127 + 155017 = 155144
- 163 + 154981 = 155144
- 211 + 154933 = 155144
- 271 + 154873 = 155144
- 337 + 154807 = 155144
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A5 B8 88 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.94.8.
- Address
- 0.2.94.8
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.94.8
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 155,144 and was likely granted around 1873.
Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.
Related reading
- Mayan numerals — Vigesimal dots-and-bars with a shell zero — one of the earliest true zeros.