Is 16 a prime number?
No, 16 is not a prime number. It is divisible by 2: 16 = 2 × 8.
Is 16 prime?
Pick any whole number from 1 to 10,000.
How to work it out
- 1
A prime number has exactly two factors: 1 and itself.
- 2
It is enough to test the primes up to √16 ≈ 4.00. If none of them divides 16, it is prime.
- 3
2 divides 16 exactly, so it is not prime. Its prime factorisation is
LaTeX source of the formulas on this page
\[ 16 = 2^{4} \]Testing 16 by the primes up to its square root
| Prime | Division | Result |
|---|---|---|
| 2 | 16 ÷ 2 | divides exactly (8) |
| 3 | 16 ÷ 3 | leaves 1 |
Questions
Is 16 a prime number?
No, 16 is not a prime number. It is divisible by 2: 16 = 2 × 8.
What is the next prime after 16?
17.
What is the prime number before 16?
13.
What are the factors of 16?
1, 2, 4, 8, 16.