The number 8,215,020 can be evenly divided by 1 2 3 4 5 6 9 10 11 12 15 18 20 22 27 30 33 36 44 45 54 55 60 66 81 90 99 108 110 132 135 162 165 180 198 220 270 297 324 330 396 405 461 495 540 594 660 810 891 922 990 1,188 1,383 1,485 1,620 1,782 1,844 1,980 2,305 2,766 2,970 3,564 4,149 4,455 4,610 5,071 5,532 5,940 6,915 8,298 8,910 9,220 10,142 12,447 13,830 15,213 16,596 17,820 20,284 20,745 24,894 25,355 27,660 30,426 37,341 41,490 45,639 49,788 50,710 60,852 62,235 74,682 76,065 82,980 91,278 101,420 124,470 136,917 149,364 152,130 182,556 186,705 228,195 248,940 273,834 304,260 373,410 410,751 456,390 547,668 684,585 746,820 821,502 912,780 1,369,170 1,643,004 2,053,755 2,738,340 4,107,510 and 8,215,020, with no remainder.
Since 8,215,020 cannot be divided by just 1 and 8,215,020, it is a composite number.