Q: Is 21,457,722 a Composite Number?

Why is 21,457,722 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 21,457,722 can be evenly divided by 1 2 3 6 11 13 22 26 33 39 66 78 89 143 178 267 281 286 429 534 562 843 858 979 1,157 1,686 1,958 2,314 2,937 3,091 3,471 3,653 5,874 6,182 6,942 7,306 9,273 10,959 12,727 18,546 21,918 25,009 25,454 38,181 40,183 50,018 75,027 76,362 80,366 120,549 150,054 241,098 275,099 325,117 550,198 650,234 825,297 975,351 1,650,594 1,950,702 3,576,287 7,152,574 10,728,861 and 21,457,722, with no remainder.

Since 21,457,722 cannot be divided by just 1 and 21,457,722, 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).