No, 159 is not a prime number. It is a composite number: its digits add up to 15, which is divisible by 3, so 159 is divisible by 3.
159 has divisors other than 1 and itself. The smallest is 3: 159 ÷ 3 = 53.
Prime factorization: 159 = 3 × 53.
| Number | Prime? |
|---|---|
| 155 | No, 5 × 31 |
| 156 | No, 2 × 2 × 3 × 13 |
| 157 | Yes |
| 158 | No, 2 × 79 |
| 160 | No, 2 × 2 × 2 × 2 × 2 × 5 |
| 161 | No, 7 × 23 |
| 162 | No, 2 × 3 × 3 × 3 × 3 |
| 163 | Yes |
More about 159: factors of 159 · square root of 159 · 159 in binary.
Another number? Use the prime number checker for any value, or see the list of prime numbers.