Q: Is 210,210 a Composite Number?

Why is 210,210 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 210,210 can be evenly divided by 1 2 3 5 6 7 10 11 13 14 15 21 22 26 30 33 35 39 42 49 55 65 66 70 77 78 91 98 105 110 130 143 147 154 165 182 195 210 231 245 273 286 294 330 385 390 429 455 462 490 539 546 637 715 735 770 858 910 1,001 1,078 1,155 1,274 1,365 1,430 1,470 1,617 1,911 2,002 2,145 2,310 2,695 2,730 3,003 3,185 3,234 3,822 4,290 5,005 5,390 6,006 6,370 7,007 8,085 9,555 10,010 14,014 15,015 16,170 19,110 21,021 30,030 35,035 42,042 70,070 105,105 and 210,210, with no remainder.

Since 210,210 cannot be divided by just 1 and 210,210, 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).