A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 5522920 can be evenly divided by 1 2 4 5 8 10 13 19 20 26 38 40 43 52 65 76 86 95 104 130 152 169 172 190 215 247 260 338 344 380 430 494 520 559 676 760 817 845 860 988 1,118 1,235 1,352 1,634 1,690 1,720 1,976 2,236 2,470 2,795 3,211 3,268 3,380 4,085 4,472 4,940 5,590 6,422 6,536 6,760 7,267 8,170 9,880 10,621 11,180 12,844 14,534 16,055 16,340 21,242 22,360 25,688 29,068 32,110 32,680 36,335 42,484 53,105 58,136 64,220 72,670 84,968 106,210 128,440 138,073 145,340 212,420 276,146 290,680 424,840 552,292 690,365 1,104,584 1,380,730 2,761,460 and 5,522,920, with no remainder.
Since 5,522,920 cannot be divided by just 1 and 5,522,920, it is not a prime number.