Q: Is 561 a Prime Number?

 A: No, 561 is not a prime number.

Why is 561 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 561 can be evenly divided by 1 3 11 17 33 51 187 and 561, with no remainder.

Since 561 cannot be divided by just 1 and 561, it is not a prime number.


More Examples

Number 559560562563
Prime? nononoyes
  • All positive natural numbers are either a prime number or a composite number (except the number 1, which is neither).

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