A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 3163160 can be evenly divided by 1 2 4 5 7 8 10 11 13 14 20 22 26 28 35 40 44 52 55 56 65 70 77 79 88 91 104 110 130 140 143 154 158 182 220 260 280 286 308 316 364 385 395 440 455 520 553 572 616 632 715 728 770 790 869 910 1,001 1,027 1,106 1,144 1,430 1,540 1,580 1,738 1,820 2,002 2,054 2,212 2,765 2,860 3,080 3,160 3,476 3,640 4,004 4,108 4,345 4,424 5,005 5,135 5,530 5,720 6,083 6,952 7,189 8,008 8,216 8,690 10,010 10,270 11,060 11,297 12,166 14,378 17,380 20,020 20,540 22,120 22,594 24,332 28,756 30,415 34,760 35,945 40,040 41,080 45,188 48,664 56,485 57,512 60,830 71,890 79,079 90,376 112,970 121,660 143,780 158,158 225,940 243,320 287,560 316,316 395,395 451,880 632,632 790,790 1,581,580 and 3,163,160, with no remainder.
Since 3,163,160 cannot be divided by just 1 and 3,163,160, it is not a prime number.