Names of 161
| Nominal | 161 |
| Cardinal | one hundred sixty-one |
| Ordinal | 161st |
| This number as US currency | one hundred sixty-one dollars |
| Is 161 an odd number? | 161 is an odd number |
| Is 161 an even number? | 161 is NOT an even number |
| Is 161 a palindrome? | 161 is a palindrome number |
| Is 161 a triangle number? | 161 is NOT a triangle number |
161 in other Bases
| Base 2 (Binary) | 101000012 |
| Base 3 (Ternary) | 122223 |
| Base 4 (Quaternary) | 22014 |
| Base 5 (Quinary) | 11215 |
| Base 6 (Senary) | 4256 |
| Base 8 (Octal) | 2418 |
| Base 12 (Duodecimal) | 11512 |
| Base 16 (Hexadecimal) | A116 |
| Base 20 (Vigesimal) | 8120 |
Primes and Factors tests for 161
| Is 161 a Prime Number? | 161 is NOT a prime |
| Is 161 a perfect number? | 161 is NOT a perfect number |
| Is 161 a Mersenne Prime? | 161 is NOT a Mersenne prime |
| Is 161 a Fermat Prime? | 161 is NOT a Fermat prime |
| Is 161 a Fibonacci Prime? | 161 is NOT a Fibonacci prime |
| Is 161 a Partition Prime? | 161 is NOT a Partition prime |
| Is 161 a Pell Prime? | 161 is NOT a Pell prime |
| Prime Factors | Prime factors of 161 |
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161 in other Numerals
| 161 in Roman Numeral | CLXI |
| 161 in Chinese Numeral | 壹佰陸拾壹 |
| 161 in Egyptian Numeral | 𓍢𓎋𓏺 |
| 161 in Babylonian Numeral |   |
Roots and stuff for 161
| Is 161 a square number? | 161 is NOT a square number |
| Is 161 a cube number? | 161 is NOT a cube number |
| Square root of the number 161 | 12.68857754045 |
| Cube root of the number 161 | 5.4401218254148 |
Recreational math for 161
| Number 161 reversed | 161 |
| Sum of the digits | 8 |
| No of digits | 3 |