A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 4226200 can be evenly divided by 1 2 4 5 8 10 11 17 20 22 25 34 40 44 50 55 68 85 88 100 110 113 136 170 187 200 220 226 275 340 374 425 440 452 550 565 680 748 850 904 935 1,100 1,130 1,243 1,496 1,700 1,870 1,921 2,200 2,260 2,486 2,825 3,400 3,740 3,842 4,520 4,675 4,972 5,650 6,215 7,480 7,684 9,350 9,605 9,944 11,300 12,430 15,368 18,700 19,210 21,131 22,600 24,860 31,075 37,400 38,420 42,262 48,025 49,720 62,150 76,840 84,524 96,050 105,655 124,300 169,048 192,100 211,310 248,600 384,200 422,620 528,275 845,240 1,056,550 2,113,100 and 4,226,200, with no remainder.
Since 4,226,200 cannot be divided by just 1 and 4,226,200, it is not a prime number.