Q: Is 21,226,401 a Composite Number?

Why is 21,226,401 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 21,226,401 can be evenly divided by 1 3 7 9 19 21 23 27 57 63 69 133 161 171 189 207 257 399 437 483 513 621 771 1,197 1,311 1,449 1,799 2,313 3,059 3,591 3,933 4,347 4,883 5,397 5,911 6,939 9,177 11,799 14,649 16,191 17,733 27,531 34,181 41,377 43,947 48,573 53,199 82,593 102,543 112,309 124,131 131,841 159,597 307,629 336,927 372,393 786,163 922,887 1,010,781 1,117,179 2,358,489 3,032,343 7,075,467 and 21,226,401, with no remainder.

Since 21,226,401 cannot be divided by just 1 and 21,226,401, 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).