A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 6122550 can be evenly divided by 1 2 3 5 6 7 10 14 15 17 21 25 30 34 35 42 49 50 51 70 75 85 98 102 105 119 147 150 170 175 210 238 245 255 294 343 350 357 425 490 510 525 595 686 714 735 833 850 1,029 1,050 1,190 1,225 1,275 1,470 1,666 1,715 1,785 2,058 2,401 2,450 2,499 2,550 2,975 3,430 3,570 3,675 4,165 4,802 4,998 5,145 5,831 5,950 7,203 7,350 8,330 8,575 8,925 10,290 11,662 12,005 12,495 14,406 17,150 17,493 17,850 20,825 24,010 24,990 25,725 29,155 34,986 36,015 40,817 41,650 51,450 58,310 60,025 62,475 72,030 81,634 87,465 120,050 122,451 124,950 145,775 174,930 180,075 204,085 244,902 291,550 360,150 408,170 437,325 612,255 874,650 1,020,425 1,224,510 2,040,850 3,061,275 and 6,122,550, with no remainder.
Since 6,122,550 cannot be divided by just 1 and 6,122,550, it is not a prime number.