The number 9,225,216 can be evenly divided by 1 2 3 4 6 7 8 9 11 12 13 14 16 18 21 22 24 26 28 32 33 36 39 42 44 48 52 56 63 64 66 72 77 78 84 88 91 96 99 104 112 117 126 128 132 143 144 154 156 168 176 182 192 198 208 224 231 234 252 256 264 273 286 288 308 312 336 352 364 384 396 416 429 448 462 468 504 512 528 546 572 576 616 624 672 693 704 728 768 792 819 832 858 896 924 936 1,001 1,008 1,024 1,056 1,092 1,144 1,152 1,232 1,248 1,287 1,344 1,386 1,408 1,456 1,536 1,584 1,638 1,664 1,716 1,792 1,848 1,872 2,002 2,016 2,112 2,184 2,288 2,304 2,464 2,496 2,574 2,688 2,772 2,816 2,912 3,003 3,072 3,168 3,276 3,328 3,432 3,584 3,696 3,744 4,004 4,032 4,224 4,368 4,576 4,608 4,928 4,992 5,148 5,376 5,544 5,632 5,824 6,006 6,336 6,552 6,656 6,864 7,168 7,392 7,488 8,008 8,064 8,448 8,736 9,009 9,152 9,216 9,856 9,984 10,296 10,752 11,088 11,264 11,648 12,012 12,672 13,104 13,312 13,728 14,784 14,976 16,016 16,128 16,896 17,472 18,018 18,304 19,712 19,968 20,592 21,504 22,176 23,296 24,024 25,344 26,208 27,456 29,568 29,952 32,032 32,256 33,792 34,944 36,036 36,608 39,424 39,936 41,184 44,352 46,592 48,048 50,688 52,416 54,912 59,136 59,904 64,064 64,512 69,888 72,072 73,216 78,848 82,368 88,704 93,184 96,096 101,376 104,832 109,824 118,272 119,808 128,128 139,776 144,144 146,432 164,736 177,408 192,192 209,664 219,648 236,544 256,256 279,552 288,288 329,472 354,816 384,384 419,328 439,296 512,512 576,576 658,944 709,632 768,768 838,656 1,025,024 1,153,152 1,317,888 1,537,536 2,306,304 3,075,072 4,612,608 and 9,225,216, with no remainder.
Since 9,225,216 cannot be divided by just 1 and 9,225,216, it is a composite number.