Is 228 a prime number?

No, 228 is not a prime number. It is a composite number: it is even, so it is divisible by 2.

Why 228 is not prime

228 has divisors other than 1 and itself. The smallest is 2: 228 ÷ 2 = 114.

Prime factorization: 228 = 2 × 2 × 3 × 19 = 2² × 3 × 19.

Quick facts about 228

Is it prime? Nearby numbers

NumberPrime?
224No, 2 × 2 × 2 × 2 × 2 × 7
225No, 3 × 3 × 5 × 5
226No, 2 × 113
227Yes
229Yes
230No, 2 × 5 × 23
231No, 3 × 7 × 11
232No, 2 × 2 × 2 × 29

More about 228: 228 in binary.

Another number? Use the prime number checker for any value, or see the list of prime numbers.