Q: Is 31,121,220 a Composite Number?

Why is 31,121,220 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 31,121,220 can be evenly divided by 1 2 3 4 5 6 10 12 13 15 17 20 26 30 34 39 51 52 60 65 68 78 85 102 130 156 170 195 204 221 255 260 340 390 442 510 663 780 884 1,020 1,105 1,326 2,210 2,347 2,652 3,315 4,420 4,694 6,630 7,041 9,388 11,735 13,260 14,082 23,470 28,164 30,511 35,205 39,899 46,940 61,022 70,410 79,798 91,533 119,697 122,044 140,820 152,555 159,596 183,066 199,495 239,394 305,110 366,132 398,990 457,665 478,788 518,687 598,485 610,220 797,980 915,330 1,037,374 1,196,970 1,556,061 1,830,660 2,074,748 2,393,940 2,593,435 3,112,122 5,186,870 6,224,244 7,780,305 10,373,740 15,560,610 and 31,121,220, with no remainder.

Since 31,121,220 cannot be divided by just 1 and 31,121,220, 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).