Is 33 a prime number?

Prime Number Checker
Number

Is 33 a prime or composite number?

Answer

Number 33 is not a Prime

33 = 3 × 11

33 has 4 divisors — 1, 3, 11 and 33; a prime has exactly two: 1 and itself.

Primes up to √33

5² = 25 ≤ 33 < 36 = 6², so it is enough to try primes up to 5

  • ÷2 does not divide
  • ÷3 divides

33 ÷ 3 = 11 — 3 divides 33, so 33 is composite

Nearest primes: 31 and 37

Related Calculations

See Also

Prime numbers list

NumberIs Prime
18No: 2 × 3²
19Yes
20No: 2² × 5
21No: 3 × 7
22No: 2 × 11
23Yes
24No: 2³ × 3
25No: 5²
26No: 2 × 13
27No: 3³
28No: 2² × 7
29Yes
30No: 2 × 3 × 5
31Yes
32No: 2⁵
33No: 3 × 11
34No: 2 × 17
35No: 5 × 7
36No: 2² × 3²
37Yes
38No: 2 × 19
39No: 3 × 13
40No: 2³ × 5
41Yes
42No: 2 × 3 × 7
43Yes
44No: 2² × 11
45No: 3² × 5
46No: 2 × 23
47Yes

FAQ

Is 33 a prime or composite number?

Number 33 is not a Prime

How many factors are in a number 33?

4

How to check if 33 is prime?

Divide 33 by the primes in order: 5² = 25 ≤ 33 < 36 = 6², so it is enough to try primes up to 5. The first one that divides it is 3: 33 ÷ 3 = 11, so 33 is composite.

See Also