Is 33 a prime number?

No, 33 is not a prime number. It is a composite number: its digits add up to 6, which is divisible by 3, so 33 is divisible by 3.

Why 33 is not prime

33 has divisors other than 1 and itself. The smallest is 3: 33 ÷ 3 = 11.

Prime factorization: 33 = 3 × 11.

Quick facts about 33

Even or odd: odd.
Nearest primes: 31 below and 37 above.
Primes up to 33: 11.

Is it prime? Nearby numbers

Number	Prime?
29	Yes
30	No, 2 × 3 × 5
31	Yes
32	No, 2 × 2 × 2 × 2 × 2
34	No, 2 × 17
35	No, 5 × 7
36	No, 2 × 2 × 3 × 3
37	Yes

More about 33: factors of 33 · 33 squared · square root of 33 · 33 in binary · 33 in Roman numerals.

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