No, 357 is not a prime number. It is a composite number: its digits add up to 15, which is divisible by 3, so 357 is divisible by 3.
357 has divisors other than 1 and itself. The smallest is 3: 357 ÷ 3 = 119.
Prime factorization: 357 = 3 × 7 × 17.
| Number | Prime? |
|---|---|
| 353 | Yes |
| 354 | No, 2 × 3 × 59 |
| 355 | No, 5 × 71 |
| 356 | No, 2 × 2 × 89 |
| 358 | No, 2 × 179 |
| 359 | Yes |
| 360 | No, 2 × 2 × 2 × 3 × 3 × 5 |
| 361 | No, 19 × 19 |
Another number? Use the prime number checker for any value, or see the list of prime numbers.