Q: Is 21,242,130 a Composite Number?

Why is 21,242,130 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 21,242,130 can be evenly divided by 1 2 3 5 6 7 10 13 14 15 21 26 30 31 35 39 42 62 65 70 78 91 93 105 130 155 182 186 195 210 217 251 273 310 390 403 434 455 465 502 546 651 753 806 910 930 1,085 1,209 1,255 1,302 1,365 1,506 1,757 2,015 2,170 2,418 2,510 2,730 2,821 3,255 3,263 3,514 3,765 4,030 5,271 5,642 6,045 6,510 6,526 7,530 7,781 8,463 8,785 9,789 10,542 12,090 14,105 15,562 16,315 16,926 17,570 19,578 22,841 23,343 26,355 28,210 32,630 38,905 42,315 45,682 46,686 48,945 52,710 54,467 68,523 77,810 84,630 97,890 101,153 108,934 114,205 116,715 137,046 163,401 202,306 228,410 233,430 272,335 303,459 326,802 342,615 505,765 544,670 606,918 685,230 708,071 817,005 1,011,530 1,416,142 1,517,295 1,634,010 2,124,213 3,034,590 3,540,355 4,248,426 7,080,710 10,621,065 and 21,242,130, with no remainder.

Since 21,242,130 cannot be divided by just 1 and 21,242,130, 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).