A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 5071440 can be evenly divided by 1 2 3 4 5 6 8 10 11 12 15 16 17 20 22 24 30 33 34 40 44 48 51 55 60 66 68 80 85 88 102 110 113 120 132 136 165 170 176 187 204 220 226 240 255 264 272 330 339 340 374 408 440 452 510 528 561 565 660 678 680 748 816 880 904 935 1,020 1,122 1,130 1,243 1,320 1,356 1,360 1,496 1,695 1,808 1,870 1,921 2,040 2,244 2,260 2,486 2,640 2,712 2,805 2,992 3,390 3,729 3,740 3,842 4,080 4,488 4,520 4,972 5,424 5,610 5,763 6,215 6,780 7,458 7,480 7,684 8,976 9,040 9,605 9,944 11,220 11,526 12,430 13,560 14,916 14,960 15,368 18,645 19,210 19,888 21,131 22,440 23,052 24,860 27,120 28,815 29,832 30,736 37,290 38,420 42,262 44,880 46,104 49,720 57,630 59,664 63,393 74,580 76,840 84,524 92,208 99,440 105,655 115,260 126,786 149,160 153,680 169,048 211,310 230,520 253,572 298,320 316,965 338,096 422,620 461,040 507,144 633,930 845,240 1,014,288 1,267,860 1,690,480 2,535,720 and 5,071,440, with no remainder.
Since 5,071,440 cannot be divided by just 1 and 5,071,440, it is not a prime number.