A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 4331430 can be evenly divided by 1 2 3 5 6 9 10 15 17 18 19 30 34 38 45 51 57 85 90 95 102 114 149 153 170 171 190 255 285 298 306 323 342 447 510 570 646 745 765 855 894 969 1,341 1,490 1,530 1,615 1,710 1,938 2,235 2,533 2,682 2,831 2,907 3,230 4,470 4,845 5,066 5,662 5,814 6,705 7,599 8,493 9,690 12,665 13,410 14,155 14,535 15,198 16,986 22,797 25,330 25,479 28,310 29,070 37,995 42,465 45,594 48,127 50,958 75,990 84,930 96,254 113,985 127,395 144,381 227,970 240,635 254,790 288,762 433,143 481,270 721,905 866,286 1,443,810 2,165,715 and 4,331,430, with no remainder.
Since 4,331,430 cannot be divided by just 1 and 4,331,430, it is not a prime number.