15,225
15,225 is a composite number, odd.
15,225 (fifteen thousand two hundred twenty-five) is an odd 5-digit number. It is a composite number with 24 divisors, and factors as 3 × 5² × 7 × 29. It is the 174th triangular number. Written other ways, in hexadecimal, 0x3B79.
Interestingness
Properties
- Parity
- Odd
- Digit count
- 5
- Digit sum
- 15
- Digit product
- 100
- Digital root
- 6
- Palindrome
- No
- Bit width
- 14 bits
- Reversed
- 52,251
- Recamán's sequence
- a(46,049) = 15,225
- Square (n²)
- 231,800,625
- Cube (n³)
- 3,529,164,515,625
- Divisor count
- 24
- σ(n) — sum of divisors
- 29,760
- φ(n) — Euler's totient
- 6,720
- Sum of prime factors
- 49
Primality
Prime factorization: 3 × 5 2 × 7 × 29
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√15,225 = [123; (2, 1, 1, 3, 3, 1, 9, 1, 1, 14, 1, 8, 1, 14, 1, 1, 9, 1, 3, 3, 1, 1, 2, 246)]
Period length 24 — the block in parentheses repeats forever.
Representations
- In words
- fifteen thousand two hundred twenty-five
- Ordinal
- 15225th
- Binary
- 11101101111001
- Octal
- 35571
- Hexadecimal
- 0x3B79
- Base64
- O3k=
- One's complement
- 50,310 (16-bit)
- Scientific notation
- 1.5225 × 10⁴
- As a duration
- 15,225 s = 4 hours, 13 minutes, 45 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹 𒌋𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓂍𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓎆𓎆𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵ιεσκεʹ
- Mayan (base 20)
- 𝋡·𝋲·𝋡·𝋥
- Chinese
- 一萬五千二百二十五
- Chinese (financial)
- 壹萬伍仟貳佰貳拾伍
Digit at this position in famous constants
- π — Pi (π)
- Digit 15,225 = 6
- e — Euler's number (e)
- Digit 15,225 = 8
- φ — Golden ratio (φ)
- Digit 15,225 = 2
- √2 — Pythagoras's (√2)
- Digit 15,225 = 7
- ln 2 — Natural log of 2
- Digit 15,225 = 9
- γ — Euler-Mascheroni (γ)
- Digit 15,225 = 5
Also seen as
UTF-8 encoding: E3 AD B9 (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.59.121.
- Address
- 0.0.59.121
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.59.121
Unspecified address (0.0.0.0/8) — "this network" placeholder.
Heard as a frequency, 15,225 Hz is closest to:
- Concert pitch (A4 = 440 Hz): A♯9 (14917.2 Hz, +35¢)
- Scientific pitch (C4 = 256 Hz): B9 (15464.4 Hz, -27¢)
- Baroque pitch (A4 = 415 Hz): B9 (14906.3 Hz, +37¢)
The digit sequence 15225 first appears in π at position 29,576 of the decimal expansion (the 29,576ordinal-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
- Triangular numbers — 1, 3, 6, 10, 15 … the counting numbers stacked into triangles, and Gauss's famous shortcut for summing them.
- Babylonian numerals — The base-60 cuneiform system that gave us 60 minutes, 60 seconds, and 360°.