531,121
531,121 is a prime, odd.
531,121 (five hundred thirty-one thousand one hundred twenty-one) is an odd 6-digit number. It is a prime number — divisible only by 1 and itself. Written other ways, in hexadecimal, 0x81AB1.
Interestingness
Properties
- Parity
- Odd
- Digit count
- 6
- Digit sum
- 13
- Digit product
- 30
- Digital root
- 4
- Palindrome
- No
- Bit width
- 20 bits
- Reversed
- 121,135
- Square (n²)
- 282,089,516,641
- Cube (n³)
- 149,823,666,167,884,561
- Divisor count
- 2
- σ(n) — sum of divisors
- 531,122
- φ(n) — Euler's totient
- 531,120
Primality
531,121 is prime. It has exactly two divisors: 1 and itself.
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√531,121 = [728; (1, 3, 1, 1, 3, 1, 1456)]
Period length 7 — the block in parentheses repeats forever.
Representations
- In words
- five hundred thirty-one thousand one hundred twenty-one
- Ordinal
- 531121st
- Binary
- 10000001101010110001
- Octal
- 2015261
- Hexadecimal
- 0x81AB1
- Base64
- CBqx
- One's complement
- 4,294,436,174 (32-bit)
- Scientific notation
- 5.31121 × 10⁵
- As a duration
- 531,121 s = 6 days, 3 hours, 32 minutes, 1 second
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹 𒁹
- Egyptian hieroglyphic
- 𓆐𓆐𓆐𓆐𓆐𓂍𓂍𓂍𓆼𓍢𓎆𓎆𓏺
- Greek (Milesian)
- ͵φλαρκαʹ
- Chinese
- 五十三萬一千一百二十一
- Chinese (financial)
- 伍拾參萬壹仟壹佰貳拾壹
Also seen as
As an unsigned 32-bit integer, this is the IPv4 address 0.8.26.177.
- Address
- 0.8.26.177
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.8.26.177
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 531,121 and was likely granted around 1894.
Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.
Related reading
- Prime numbers — The building blocks of arithmetic: what primes are, why they matter, and how we find them.
- Egyptian hieroglyphic numerals — Seven hieroglyphs for every power of ten, from a single stroke to a million.