A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 2283372 can be evenly divided by 1 2 3 4 6 7 9 12 13 14 17 18 21 26 28 34 36 39 41 42 51 52 63 68 78 82 84 91 102 117 119 123 126 153 156 164 182 204 221 234 238 246 252 273 287 306 357 364 369 442 468 476 492 533 546 574 612 663 697 714 738 819 861 884 1,066 1,071 1,092 1,148 1,326 1,394 1,428 1,476 1,547 1,599 1,638 1,722 1,989 2,091 2,132 2,142 2,583 2,652 2,788 3,094 3,198 3,276 3,444 3,731 3,978 4,182 4,284 4,641 4,797 4,879 5,166 6,188 6,273 6,396 7,462 7,956 8,364 9,061 9,282 9,594 9,758 10,332 11,193 12,546 13,923 14,637 14,924 18,122 18,564 19,188 19,516 22,386 25,092 27,183 27,846 29,274 33,579 36,244 43,911 44,772 54,366 55,692 58,548 63,427 67,158 81,549 87,822 108,732 126,854 134,316 163,098 175,644 190,281 253,708 326,196 380,562 570,843 761,124 1,141,686 and 2,283,372, with no remainder.
Since 2,283,372 cannot be divided by just 1 and 2,283,372, it is not a prime number.