161,320
161,320 is a composite number, even.
161,320 (one hundred sixty-one thousand three hundred twenty) is an even 6-digit number. It is a composite number with 32 divisors, and factors as 2³ × 5 × 37 × 109. Its proper divisors sum to 214,880, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x27628.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 13
- Digit product
- 0
- Digital root
- 4
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 23,161
- Recamán's sequence
- a(199,516) = 161,320
- Square (n²)
- 26,024,142,400
- Cube (n³)
- 4,198,214,651,968,000
- Divisor count
- 32
- σ(n) — sum of divisors
- 376,200
- φ(n) — Euler's totient
- 62,208
- Sum of prime factors
- 157
Primality
Prime factorization: 2 3 × 5 × 37 × 109
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√161,320 = [401; (1, 1, 1, 4, 1, 6, 1, 9, 22, 4, 1, 2, 2, 2, 1, 4, 22, 9, 1, 6, 1, 4, 1, 1, …)]
Period length 26 — the block in parentheses repeats forever.
Representations
- In words
- one hundred sixty-one thousand three hundred twenty
- Ordinal
- 161320th
- Binary
- 100111011000101000
- Octal
- 473050
- Hexadecimal
- 0x27628
- Base64
- AnYo
- One's complement
- 4,294,805,975 (32-bit)
- Scientific notation
- 1.6132 × 10⁵
- As a duration
- 161,320 s = 1 day, 20 hours, 48 minutes, 40 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓂍𓂍𓂍𓆼𓍢𓍢𓍢𓎆𓎆
- Greek (Milesian)
- ͵ρξατκʹ
- Chinese
- 一十六萬一千三百二十
- Chinese (financial)
- 壹拾陸萬壹仟參佰貳拾
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 161320, here are decompositions:
- 11 + 161309 = 161320
- 17 + 161303 = 161320
- 53 + 161267 = 161320
- 83 + 161237 = 161320
- 179 + 161141 = 161320
- 197 + 161123 = 161320
- 227 + 161093 = 161320
- 233 + 161087 = 161320
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A7 98 A8 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.118.40.
- Address
- 0.2.118.40
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.118.40
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 161,320 and was likely granted around 1874.
Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.
Related reading
- Babylonian numerals — The base-60 cuneiform system that gave us 60 minutes, 60 seconds, and 360°.