Number
161
161 is a composite number, odd, a calendar year.
Properties
- Parity
- Odd
- Digit count
- 3
- Digit sum
- 8
- Digital root
- 8
- Palindrome
- Yes
- Divisor count
- 4
- σ(n) — sum of divisors
- 192
Primality
Prime factorization: 7 × 23
Divisors & multiples
Aliquot sum (sum of proper divisors):
31
Representations
- In words
- one hundred sixty-one
- Ordinal
- 161st
- Roman numeral
- CLXI
- Binary
- 10100001
- Octal
- 241
- Hexadecimal
- A1
Also seen as
Unicode codepoint
¡
U+00A1
Other punctuation (Po)
UTF-8 encoding: C2 A1 (2 bytes).
Network port
TCP/UDP port 161 is the well-known port for SNMP — Simple Network Management Protocol.
Hex color
#0000A1
RGB(0, 0, 161)
IPv4 address
As an unsigned 32-bit integer, this is the IPv4 address 0.0.0.161.