Q: Is 21,555,072 a Composite Number?

Why is 21,555,072 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 21,555,072 can be evenly divided by 1 2 3 4 6 7 8 9 11 12 14 16 18 21 22 24 27 28 32 33 36 42 44 48 54 56 63 64 66 72 77 81 84 88 96 99 108 112 126 128 132 144 154 162 168 176 189 192 198 216 224 231 243 252 264 288 297 308 324 336 352 378 384 396 432 448 462 486 504 528 567 576 594 616 648 672 693 704 729 756 792 864 891 896 924 972 1,008 1,056 1,134 1,152 1,188 1,232 1,296 1,344 1,386 1,408 1,458 1,512 1,584 1,701 1,728 1,782 1,848 1,944 2,016 2,079 2,112 2,187 2,268 2,376 2,464 2,592 2,673 2,688 2,772 2,916 3,024 3,168 3,402 3,456 3,564 3,696 3,888 4,032 4,158 4,224 4,374 4,536 4,752 4,928 5,103 5,184 5,346 5,544 5,832 6,048 6,237 6,336 6,804 7,128 7,392 7,776 8,019 8,064 8,316 8,748 9,072 9,504 9,856 10,206 10,368 10,692 11,088 11,664 12,096 12,474 12,672 13,608 14,256 14,784 15,309 15,552 16,038 16,632 17,496 18,144 18,711 19,008 20,412 21,384 22,176 23,328 24,057 24,192 24,948 27,216 28,512 29,568 30,618 31,104 32,076 33,264 34,992 36,288 37,422 38,016 40,824 42,768 44,352 46,656 48,114 49,896 54,432 56,133 57,024 61,236 64,152 66,528 69,984 72,576 74,844 81,648 85,536 88,704 93,312 96,228 99,792 108,864 112,266 114,048 122,472 128,304 133,056 139,968 149,688 163,296 168,399 171,072 192,456 199,584 217,728 224,532 244,944 256,608 266,112 279,936 299,376 326,592 336,798 342,144 384,912 399,168 449,064 489,888 513,216 598,752 653,184 673,596 769,824 798,336 898,128 979,776 1,026,432 1,197,504 1,347,192 1,539,648 1,796,256 1,959,552 2,395,008 2,694,384 3,079,296 3,592,512 5,388,768 7,185,024 10,777,536 and 21,555,072, with no remainder.

Since 21,555,072 cannot be divided by just 1 and 21,555,072, 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).