Is 54 a prime number?

Prime Number Checker
Number

Is 54 a prime or composite number?

Answer

Number 54 is not a Prime

54 = 2 × 3³

54 has 8 divisors — 1, 2, 3, 6, 9, 18, 27 and 54; a prime has exactly two: 1 and itself.

Primes up to √54

7² = 49 ≤ 54 < 64 = 8², so it is enough to try primes up to 7

  • ÷2 divides

54 ÷ 2 = 27 — 2 divides 54, so 54 is composite

Nearest primes: 53 and 59

Related Calculations

See Also

Prime numbers list

NumberIs Prime
39No: 3 × 13
40No: 2³ × 5
41Yes
42No: 2 × 3 × 7
43Yes
44No: 2² × 11
45No: 3² × 5
46No: 2 × 23
47Yes
48No: 2⁴ × 3
49No: 7²
50No: 2 × 5²
51No: 3 × 17
52No: 2² × 13
53Yes
54No: 2 × 3³
55No: 5 × 11
56No: 2³ × 7
57No: 3 × 19
58No: 2 × 29
59Yes
60No: 2² × 3 × 5
61Yes
62No: 2 × 31
63No: 3² × 7
64No: 2⁶
65No: 5 × 13
66No: 2 × 3 × 11
67Yes
68No: 2² × 17

FAQ

Is 54 a prime or composite number?

Number 54 is not a Prime

How many factors are in a number 54?

8

How to check if 54 is prime?

Divide 54 by the primes in order: 7² = 49 ≤ 54 < 64 = 8², so it is enough to try primes up to 7. The first one that divides it is 2: 54 ÷ 2 = 27, so 54 is composite.

See Also