A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 5692518 can be evenly divided by 1 2 3 6 9 13 17 18 26 27 34 39 51 53 54 78 81 102 106 117 153 159 162 221 234 243 306 318 351 442 459 477 486 663 689 702 901 918 954 1,053 1,326 1,377 1,378 1,431 1,802 1,989 2,067 2,106 2,703 2,754 2,862 3,159 3,978 4,131 4,134 4,293 5,406 5,967 6,201 6,318 8,109 8,262 8,586 11,713 11,934 12,402 12,879 16,218 17,901 18,603 23,426 24,327 25,758 35,139 35,802 37,206 48,654 53,703 55,809 70,278 72,981 105,417 107,406 111,618 145,962 167,427 210,834 218,943 316,251 334,854 437,886 632,502 948,753 1,897,506 2,846,259 and 5,692,518, with no remainder.
Since 5,692,518 cannot be divided by just 1 and 5,692,518, it is not a prime number.