Q: Is 21,163,750 a Composite Number?

Why is 21,163,750 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 21,163,750 can be evenly divided by 1 2 5 10 25 50 125 250 625 1,250 16,931 33,862 84,655 169,310 423,275 846,550 2,116,375 4,232,750 10,581,875 and 21,163,750, with no remainder.

Since 21,163,750 cannot be divided by just 1 and 21,163,750, it is a composite number.

More Examples

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