The number 2,225,808 can be evenly divided by 1 2 3 4 6 8 9 12 13 16 18 24 26 29 36 39 41 48 52 58 72 78 82 87 104 116 117 123 144 156 164 174 208 232 234 246 261 312 328 348 369 377 464 468 492 522 533 624 656 696 738 754 936 984 1,044 1,066 1,131 1,189 1,392 1,476 1,508 1,599 1,872 1,968 2,088 2,132 2,262 2,378 2,952 3,016 3,198 3,393 3,567 4,176 4,264 4,524 4,756 4,797 5,904 6,032 6,396 6,786 7,134 8,528 9,048 9,512 9,594 10,701 12,792 13,572 14,268 15,457 18,096 19,024 19,188 21,402 25,584 27,144 28,536 30,914 38,376 42,804 46,371 54,288 57,072 61,828 76,752 85,608 92,742 123,656 139,113 171,216 185,484 247,312 278,226 370,968 556,452 741,936 1,112,904 and 2,225,808, with no remainder.
Since 2,225,808 cannot be divided by just 1 and 2,225,808, it is a composite number.