A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 2254350 can be evenly divided by 1 2 3 5 6 7 10 14 15 19 21 25 30 35 38 42 50 57 70 75 95 105 113 114 133 150 175 190 210 226 266 285 339 350 399 475 525 565 570 665 678 791 798 950 1,050 1,130 1,330 1,425 1,582 1,695 1,995 2,147 2,373 2,825 2,850 3,325 3,390 3,955 3,990 4,294 4,746 5,650 6,441 6,650 7,910 8,475 9,975 10,735 11,865 12,882 15,029 16,950 19,775 19,950 21,470 23,730 30,058 32,205 39,550 45,087 53,675 59,325 64,410 75,145 90,174 107,350 118,650 150,290 161,025 225,435 322,050 375,725 450,870 751,450 1,127,175 and 2,254,350, with no remainder.
Since 2,254,350 cannot be divided by just 1 and 2,254,350, it is not a prime number.