No, 56 is not a prime number. It is a composite number: it is even, so it is divisible by 2.
56 has divisors other than 1 and itself. The smallest is 2: 56 ÷ 2 = 28.
Prime factorization: 56 = 2 × 2 × 2 × 7 = 2³ × 7.
| Number | Prime? |
|---|---|
| 52 | No, 2 × 2 × 13 |
| 53 | Yes |
| 54 | No, 2 × 3 × 3 × 3 |
| 55 | No, 5 × 11 |
| 57 | No, 3 × 19 |
| 58 | No, 2 × 29 |
| 59 | Yes |
| 60 | No, 2 × 2 × 3 × 5 |
More about 56: factors of 56 · 56 squared · square root of 56 · 56 in binary · 56 in Roman numerals.
Another number? Use the prime number checker for any value, or see the list of prime numbers.