Q: Is 161,523 a Prime Number?

A: No, 161,523 is not a prime number.

Why is 161,523 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 161523 can be evenly divided by 1 3 9 131 137 393 411 1,179 1,233 17,947 53,841 and 161,523, with no remainder.

Since 161,523 cannot be divided by just 1 and 161,523, it is not a prime number.

Number	161,521	161,522	161,524	161,525
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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