Is 51 a Prime Number?

No, 51 is not a prime number, it is a composite number.

51 Not a Prime Number Proof with Adraktas Formula

X = 51

a5 = [ X - 5 ] / 6
a5 = [ 51 - 5 ] / 6
a5 = 7.66666666667
a5 is not integer

a7 = [ X - 7 ] / 6
a7 = [ 51 - 7 ] / 6
a7 = 7.33333333333
a7 is not integer

Both a5 and a7 is not integer.

51 is not a prime number

Why 51 is not a prime number?

Because 51 has divisors rather than 1 and itself. 51 can be divided by 3 and 17.

Prime factorization of 51 (list of divisors):

  • 3
  • 17

The next prime number of 51 is 53
The previous prime number of 51 is 47.


Related Prime Numbers

Biggest 10 prime numbers smaller than 51

Smallest 10 prime numbers bigger than 51

Related Non-Prime Numbers

Biggest 10 composite numbers smaller than 51

Smallest 10 composite numbers bigger than 51