165
Everything about the number 165 — its names, how to write it in other bases and numeral systems, and what makes it interesting mathematically.
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Names of 165
| Nominal | 165 |
| Cardinal | one hundred sixty-five |
| Ordinal | 165th |
| This number as US currency | one hundred sixty-five dollars |
Properties (and some facts) of 165
| Is 165 an odd number? | 165 is an odd number |
| Is 165 an even number? | 165 is not an even number |
| Is 165 a palindrome? | 165 is not a palindrome |
| Is 165 a triangle number? | 165 is not a triangle number |
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165 in other bases
| Base 2 (Binary) | 10100101 |
| Base 3 (Ternary) | 20010 |
| Base 4 (Quaternary) | 2211 |
| Base 5 (Quinary) | 1130 |
| Base 6 (Senary) | 433 |
| Base 8 (Octal) | 245 |
| Base 12 (Duodecimal) | 119 |
| Base 16 (Hexadecimal) | A5 |
| Base 20 (Vigesimal) | 85 |
Primes and factors tests for 165
| Is 165 a prime number? | 165 is not a prime number |
| Is 165 a perfect number? | 165 is not a perfect number |
| Is 165 a Mersenne prime? | 165 is not a Mersenne prime |
| Is 165 a Fermat prime? | 165 is not a Fermat prime |
| Is 165 a Fibonacci prime? | 165 is not a Fibonacci prime |
| Is 165 a partition prime? | 165 is not a partition prime |
| Is 165 a Pell prime? | 165 is not a Pell prime |
| Prime Factors | Prime factors of 165 |
165 in other numeral systems
| 165 in Roman numerals | CLXV |
| 165 in Chinese numerals | 壹佰陸拾伍 |
| 165 in Babylonian numerals |   |
| 165 in Egyptian numerals | 𓍢𓎋𓏾 |
Roots and squares for 165
| Is 165 a square number? | 165 is not a square number |
| Is 165 a cube number? | 165 is not a cube number |
| Square root of 165 | 12.845232578665 |
| Cube root of 165 | 5.4848065524326 |
Recreational math for 165
| Number 165 reversed | 561 |
| Sum of the digits | 12 |
| Number of digits | 3 |
Arithmetic tables for 165
Other pages about 165
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