155,000
155,000 is a composite number, even.
155,000 (one hundred fifty-five thousand) is an even 6-digit number. It is a composite number with 40 divisors, and factors as 2³ × 5⁴ × 31. Its proper divisors sum to 219,880, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x25D78.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 11
- Digit product
- 0
- Digital root
- 2
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 551
- Recamán's sequence
- a(47,108) = 155,000
- Square (n²)
- 24,025,000,000
- Cube (n³)
- 3,723,875,000,000,000
- Divisor count
- 40
- σ(n) — sum of divisors
- 374,880
- φ(n) — Euler's totient
- 60,000
- Sum of prime factors
- 57
Primality
Prime factorization: 2 3 × 5 4 × 31
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√155,000 = [393; (1, 2, 2, 1, 24, 1, 2, 2, 1, 786)]
Period length 10 — the block in parentheses repeats forever.
Representations
- In words
- one hundred fifty-five thousand
- Ordinal
- 155000th
- Binary
- 100101110101111000
- Octal
- 456570
- Hexadecimal
- 0x25D78
- Base64
- Al14
- One's complement
- 4,294,812,295 (32-bit)
- Scientific notation
- 1.55 × 10⁵
- As a duration
- 155,000 s = 1 day, 19 hours, 3 minutes, 20 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒌋𒁹𒁹𒁹 𒁹𒁹𒁹 𒌋𒌋
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼
- Greek (Milesian)
- ͵ρνε
- Mayan (base 20)
- 𝋳·𝋧·𝋪·𝋠
- Chinese
- 一十五萬五千
- Chinese (financial)
- 壹拾伍萬伍仟
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 155000, here are decompositions:
- 19 + 154981 = 155000
- 67 + 154933 = 155000
- 73 + 154927 = 155000
- 103 + 154897 = 155000
- 127 + 154873 = 155000
- 151 + 154849 = 155000
- 193 + 154807 = 155000
- 211 + 154789 = 155000
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A5 B5 B8 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.93.120.
- Address
- 0.2.93.120
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.93.120
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 155,000 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 155000 first appears in π at position 872,293 of the decimal expansion (the 872,293ordinal-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.
Related reading
- Mayan numerals — Vigesimal dots-and-bars with a shell zero — one of the earliest true zeros.