Is 16 a Prime Number?

No, 16 is not a prime number, it is a composite number.

16 Not a Prime Number Proof with Adraktas Formula

X = 16

a5 = [ X - 5 ] / 6
a5 = [ 16 - 5 ] / 6
a5 = 1.83333333333
a5 is not integer

a7 = [ X - 7 ] / 6
a7 = [ 16 - 7 ] / 6
a7 = 1.5
a7 is not integer

Both a5 and a7 is not integer.

16 is not a prime number

Why 16 is not a prime number?

Because 16 has divisors rather than 1 and itself. 16 can be divided by 2 and 2.

Prime factorization of 16 (list of divisors):

  • 2
  • 2
  • 2

The next prime number of 16 is 17
The previous prime number of 16 is 13.


Related Prime Numbers

Biggest 10 prime numbers smaller than 16

Smallest 10 prime numbers bigger than 16

Related Non-Prime Numbers

Biggest 10 composite numbers smaller than 16

Smallest 10 composite numbers bigger than 16