Q: Is 16,431 a Prime Number?
A: No, 16,431 is not a prime number.
A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 16431 can be evenly divided by 1 3 5,477 and 16,431, with no remainder.
Since 16,431 cannot be divided by just 1 and 16,431, it is not a prime number.