A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 5958150 can be evenly divided by 1 2 3 5 6 10 11 15 22 23 25 30 33 46 50 55 66 69 75 110 115 138 150 157 165 230 253 275 314 330 345 471 506 550 575 690 759 785 825 942 1,150 1,265 1,518 1,570 1,650 1,725 1,727 2,355 2,530 3,450 3,454 3,611 3,795 3,925 4,710 5,181 6,325 7,222 7,590 7,850 8,635 10,362 10,833 11,775 12,650 17,270 18,055 18,975 21,666 23,550 25,905 36,110 37,950 39,721 43,175 51,810 54,165 79,442 86,350 90,275 108,330 119,163 129,525 180,550 198,605 238,326 259,050 270,825 397,210 541,650 595,815 993,025 1,191,630 1,986,050 2,979,075 and 5,958,150, with no remainder.
Since 5,958,150 cannot be divided by just 1 and 5,958,150, it is not a prime number.