No, 351 is not a prime number. It is a composite number: its digits add up to 9, which is divisible by 3, so 351 is divisible by 3.
351 has divisors other than 1 and itself. The smallest is 3: 351 ÷ 3 = 117.
Prime factorization: 351 = 3 × 3 × 3 × 13 = 3³ × 13.
| Number | Prime? |
|---|---|
| 347 | Yes |
| 348 | No, 2 × 2 × 3 × 29 |
| 349 | Yes |
| 350 | No, 2 × 5 × 5 × 7 |
| 352 | No, 2 × 2 × 2 × 2 × 2 × 11 |
| 353 | Yes |
| 354 | No, 2 × 3 × 59 |
| 355 | No, 5 × 71 |
Another number? Use the prime number checker for any value, or see the list of prime numbers.