Q: Is 81 a Composite Number?

 A: Yes, 81 is a composite number.

Why is 81 a composite number?

A composite number is a number that can be divided evenly by more numbers than 1 and itself. It is the opposite of a prime number.

The number 81 can be evenly divided by 1 3 9 27 and 81, with no remainder.

Since 81 cannot be divided by just 1 and 81, it is a composite number.


More Examples

Number 79808283
Composite? noyesyesno
  • All positive natural numbers are either a prime number or a composite number (except the number 1, which is neither).

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