161 (number)
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|---|---|---|---|---|
| Cardinal | one hundred sixty-one | |||
| Ordinal | 161st (one hundred and sixty-first) |
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| Factorization | 7 × 23 | |||
| Divisors | 1, 7, 23, 161 | |||
| Roman numeral | CLXI | |||
| Binary | 101000012 | |||
| Ternary | 122223 | |||
| Quaternary | 22014 | |||
| Quinary | 11215 | |||
| Senary | 4256 | |||
| Octal | 2418 | |||
| Duodecimal | 11512 | |||
| Hexadecimal | A116 | |||
| Vigesimal | 8120 | |||
| Base 36 | 4H36 | |||
161 (one hundred [and] sixty-one) is the natural number following 160 and preceding 162.
161 is the sum of five consecutive prime numbers: 23, 29, 31, 37, and 41
161 is a hexagonal pyramidal number.
161 is a semiprime. Since its prime factors 7 and 23 are both Gaussian primes, 161 is a Blum integer.
161 is also:
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