165,172
165,172 is a composite number, even.
165,172 (one hundred sixty-five thousand one hundred seventy-two) is an even 6-digit number. It is a composite number with 24 divisors, and factors as 2² × 7 × 17 × 347. Its proper divisors sum to 185,612, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x28534.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 22
- Digit product
- 420
- Digital root
- 4
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 271,561
- Square (n²)
- 27,281,789,584
- Cube (n³)
- 4,506,187,749,168,448
- Divisor count
- 24
- σ(n) — sum of divisors
- 350,784
- φ(n) — Euler's totient
- 66,432
- Sum of prime factors
- 375
Primality
Prime factorization: 2 2 × 7 × 17 × 347
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√165,172 = [406; (2, 2, 2, 1, 1, 5, 17, 8, 1, 2, 6, 1, 41, 1, 10, 1, 41, 1, 6, 2, 1, 8, 17, 5, …)]
Period length 30 — the block in parentheses repeats forever.
Representations
- In words
- one hundred sixty-five thousand one hundred seventy-two
- Ordinal
- 165172nd
- Binary
- 101000010100110100
- Octal
- 502464
- Hexadecimal
- 0x28534
- Base64
- AoU0
- One's complement
- 4,294,802,123 (32-bit)
- Scientific notation
- 1.65172 × 10⁵
- As a duration
- 165,172 s = 1 day, 21 hours, 52 minutes, 52 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺
- Greek (Milesian)
- ͵ρξεροβʹ
- Chinese
- 一十六萬五千一百七十二
- Chinese (financial)
- 壹拾陸萬伍仟壹佰柒拾貳
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 165172, here are decompositions:
- 11 + 165161 = 165172
- 83 + 165089 = 165172
- 89 + 165083 = 165172
- 113 + 165059 = 165172
- 131 + 165041 = 165172
- 173 + 164999 = 165172
- 383 + 164789 = 165172
- 401 + 164771 = 165172
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A8 94 B4 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.133.52.
- Address
- 0.2.133.52
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.133.52
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 165,172 and was likely granted around 1874.
Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.
The digit sequence 165172 first appears in π at position 100,348 of the decimal expansion (the 100,348ordinal-suffix:th 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°.