A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 9221940 can be evenly divided by 1 2 3 4 5 6 7 9 10 12 13 14 15 18 20 21 26 28 30 35 36 39 42 45 52 60 63 65 70 78 84 90 91 105 117 126 130 140 156 180 182 195 210 234 252 260 273 315 364 390 420 455 468 546 563 585 630 780 819 910 1,092 1,126 1,170 1,260 1,365 1,638 1,689 1,820 2,252 2,340 2,730 2,815 3,276 3,378 3,941 4,095 5,067 5,460 5,630 6,756 7,319 7,882 8,190 8,445 10,134 11,260 11,823 14,638 15,764 16,380 16,890 19,705 20,268 21,957 23,646 25,335 29,276 33,780 35,469 36,595 39,410 43,914 47,292 50,670 51,233 59,115 65,871 70,938 73,190 78,820 87,828 101,340 102,466 109,785 118,230 131,742 141,876 146,380 153,699 177,345 204,932 219,570 236,460 256,165 263,484 307,398 329,355 354,690 439,140 461,097 512,330 614,796 658,710 709,380 768,495 922,194 1,024,660 1,317,420 1,536,990 1,844,388 2,305,485 3,073,980 4,610,970 and 9,221,940, with no remainder.
Since 9,221,940 cannot be divided by just 1 and 9,221,940, it is not a prime number.