Q: Is 231,591 a Prime Number?

A: No, 231,591 is not a prime number.

Why is 231,591 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 231591 can be evenly divided by 1 3 17 19 51 57 239 323 717 969 4,063 4,541 12,189 13,623 77,197 and 231,591, with no remainder.

Since 231,591 cannot be divided by just 1 and 231,591, it is not a prime number.

Number	231,589	231,590	231,592	231,593
Prime?	yes	no	no	no

All positive natural numbers are either a prime number or a composite number (except the number 1, which is neither).

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