155,520
155,520 is a composite number, even.
155,520 (one hundred fifty-five thousand five hundred twenty) is an even 6-digit number. It is a composite number with 96 divisors, and factors as 2⁷ × 3⁵ × 5. Its proper divisors sum to 401,400, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x25F80.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 18
- Digit product
- 0
- Digital root
- 9
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 25,551
- Square (n²)
- 24,186,470,400
- Cube (n³)
- 3,761,479,876,608,000
- Divisor count
- 96
- σ(n) — sum of divisors
- 556,920
- φ(n) — Euler's totient
- 41,472
- Sum of prime factors
- 34
Primality
Prime factorization: 2 7 × 3 5 × 5
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√155,520 = [394; (2, 1, 3, 2, 6, 5, 3, 9, 2, 2, 1, 3, 1, 21, 8, 3, 1, 8, 1, 48, 2, 1, 1, 15, …)]
Representations
- In words
- one hundred fifty-five thousand five hundred twenty
- Ordinal
- 155520th
- Binary
- 100101111110000000
- Octal
- 457600
- Hexadecimal
- 0x25F80
- Base64
- Al+A
- One's complement
- 4,294,811,775 (32-bit)
- Scientific notation
- 1.5552 × 10⁵
- As a duration
- 155,520 s = 1 day, 19 hours, 12 minutes
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒌋𒁹𒁹𒁹 𒌋𒁹𒁹 ·
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓎆𓎆
- Greek (Milesian)
- ͵ρνεφκʹ
- Mayan (base 20)
- 𝋳·𝋨·𝋰·𝋠
- Chinese
- 一十五萬五千五百二十
- Chinese (financial)
- 壹拾伍萬伍仟伍佰貳拾
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 155520, here are decompositions:
- 11 + 155509 = 155520
- 19 + 155501 = 155520
- 47 + 155473 = 155520
- 59 + 155461 = 155520
- 67 + 155453 = 155520
- 97 + 155423 = 155520
- 107 + 155413 = 155520
- 137 + 155383 = 155520
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A5 BE 80 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.95.128.
- Address
- 0.2.95.128
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.95.128
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 155,520 and was likely granted around 1873.
Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.
The digit sequence 155520 first appears in π at position 774,681 of the decimal expansion (the 774,681ordinal-suffix:st 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
- Babylonian numerals — The base-60 cuneiform system that gave us 60 minutes, 60 seconds, and 360°.