No, 22 is not a prime number. It is a composite number: it is even, so it is divisible by 2.
22 has divisors other than 1 and itself. The smallest is 2: 22 ÷ 2 = 11.
Prime factorization: 22 = 2 × 11.
| Number | Prime? |
|---|---|
| 18 | No, 2 × 3 × 3 |
| 19 | Yes |
| 20 | No, 2 × 2 × 5 |
| 21 | No, 3 × 7 |
| 23 | Yes |
| 24 | No, 2 × 2 × 2 × 3 |
| 25 | No, 5 × 5 |
| 26 | No, 2 × 13 |
More about 22: factors of 22 · 22 squared · square root of 22 · 22 in binary · 22 in Roman numerals.
Another number? Use the prime number checker for any value, or see the list of prime numbers.