A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 2296530 can be evenly divided by 1 2 3 5 6 9 10 15 17 18 19 30 34 38 45 51 57 79 85 90 95 102 114 153 158 170 171 190 237 255 285 306 323 342 395 474 510 570 646 711 765 790 855 969 1,185 1,343 1,422 1,501 1,530 1,615 1,710 1,938 2,370 2,686 2,907 3,002 3,230 3,555 4,029 4,503 4,845 5,814 6,715 7,110 7,505 8,058 9,006 9,690 12,087 13,430 13,509 14,535 15,010 20,145 22,515 24,174 25,517 27,018 29,070 40,290 45,030 51,034 60,435 67,545 76,551 120,870 127,585 135,090 153,102 229,653 255,170 382,755 459,306 765,510 1,148,265 and 2,296,530, with no remainder.
Since 2,296,530 cannot be divided by just 1 and 2,296,530, it is not a prime number.