Q: Is 21,513,438 a Composite Number?

Why is 21,513,438 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 21,513,438 can be evenly divided by 1 2 3 6 9 18 27 41 54 79 81 82 123 158 162 237 246 369 474 711 738 1,107 1,422 1,681 2,133 2,214 3,239 3,321 3,362 4,266 5,043 6,399 6,478 6,642 9,717 10,086 12,798 15,129 19,434 29,151 30,258 45,387 58,302 87,453 90,774 132,799 136,161 174,906 262,359 265,598 272,322 398,397 524,718 796,794 1,195,191 2,390,382 3,585,573 7,171,146 10,756,719 and 21,513,438, with no remainder.

Since 21,513,438 cannot be divided by just 1 and 21,513,438, 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).