Q: Is 21,572,568 a Composite Number?

Why is 21,572,568 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 21,572,568 can be evenly divided by 1 2 3 4 6 8 9 12 18 24 27 36 54 72 81 108 137 162 216 243 274 324 411 486 548 648 729 822 972 1,096 1,233 1,458 1,644 1,944 2,187 2,466 2,916 3,288 3,699 4,374 4,932 5,832 6,561 7,398 8,748 9,864 11,097 13,122 14,796 17,496 19,683 22,194 26,244 29,592 33,291 39,366 44,388 52,488 66,582 78,732 88,776 99,873 133,164 157,464 199,746 266,328 299,619 399,492 599,238 798,984 898,857 1,198,476 1,797,714 2,396,952 2,696,571 3,595,428 5,393,142 7,190,856 10,786,284 and 21,572,568, with no remainder.

Since 21,572,568 cannot be divided by just 1 and 21,572,568, 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).