Q: Is 21,181 a Prime Number?

A: No, 21,181 is not a prime number.

Why is 21,181 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 21181 can be evenly divided by 1 59 359 and 21,181, with no remainder.

Since 21,181 cannot be divided by just 1 and 21,181, it is not a prime number.

Number	21,179	21,180	21,182	21,183
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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