Q: Is 428,223 a Prime Number?

A: No, 428,223 is not a prime number.

Why is 428,223 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 428223 can be evenly divided by 1 3 349 409 1,047 1,227 142,741 and 428,223, with no remainder.

Since 428,223 cannot be divided by just 1 and 428,223, it is not a prime number.

Number	428,221	428,222	428,224	428,225
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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