Q: Is 15,663,375 a Composite Number?

Why is 15,663,375 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 15,663,375 can be evenly divided by 1 3 5 7 9 13 15 17 21 25 27 35 39 45 51 63 65 75 81 85 91 105 117 119 125 135 153 175 189 195 221 225 255 273 315 325 351 357 375 405 425 455 459 525 567 585 595 663 675 765 819 875 945 975 1,053 1,071 1,105 1,125 1,275 1,365 1,377 1,547 1,575 1,625 1,755 1,785 1,989 2,025 2,125 2,275 2,295 2,457 2,625 2,835 2,925 2,975 3,213 3,315 3,375 3,825 4,095 4,641 4,725 4,875 5,265 5,355 5,525 5,967 6,375 6,825 6,885 7,371 7,735 7,875 8,775 8,925 9,639 9,945 10,125 11,375 11,475 12,285 13,923 14,175 14,625 14,875 16,065 16,575 17,901 19,125 20,475 23,205 23,625 26,325 26,775 27,625 29,835 34,125 34,425 36,855 38,675 41,769 43,875 44,625 48,195 49,725 57,375 61,425 69,615 70,875 80,325 82,875 89,505 102,375 116,025 125,307 131,625 133,875 149,175 172,125 184,275 193,375 208,845 240,975 248,625 307,125 348,075 401,625 447,525 580,125 626,535 745,875 921,375 1,044,225 1,204,875 1,740,375 2,237,625 3,132,675 5,221,125 and 15,663,375, with no remainder.

Since 15,663,375 cannot be divided by just 1 and 15,663,375, 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).