Q: Is 21,220,100 a Composite Number?

Why is 21,220,100 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 21,220,100 can be evenly divided by 1 2 4 5 10 11 20 22 25 44 50 55 100 101 110 191 202 220 275 382 404 505 550 764 955 1,010 1,100 1,111 1,910 2,020 2,101 2,222 2,525 3,820 4,202 4,444 4,775 5,050 5,555 8,404 9,550 10,100 10,505 11,110 19,100 19,291 21,010 22,220 27,775 38,582 42,020 52,525 55,550 77,164 96,455 105,050 111,100 192,910 210,100 212,201 385,820 424,402 482,275 848,804 964,550 1,061,005 1,929,100 2,122,010 4,244,020 5,305,025 10,610,050 and 21,220,100, with no remainder.

Since 21,220,100 cannot be divided by just 1 and 21,220,100, 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).