The number 2,131,200 can be evenly divided by 1 2 3 4 5 6 8 9 10 12 15 16 18 20 24 25 30 32 36 37 40 45 48 50 60 64 72 74 75 80 90 96 100 111 120 128 144 148 150 160 180 185 192 200 222 225 240 256 288 296 300 320 333 360 370 384 400 444 450 480 555 576 592 600 640 666 720 740 768 800 888 900 925 960 1,110 1,152 1,184 1,200 1,280 1,332 1,440 1,480 1,600 1,665 1,776 1,800 1,850 1,920 2,220 2,304 2,368 2,400 2,664 2,775 2,880 2,960 3,200 3,330 3,552 3,600 3,700 3,840 4,440 4,736 4,800 5,328 5,550 5,760 5,920 6,400 6,660 7,104 7,200 7,400 8,325 8,880 9,472 9,600 10,656 11,100 11,520 11,840 13,320 14,208 14,400 14,800 16,650 17,760 19,200 21,312 22,200 23,680 26,640 28,416 28,800 29,600 33,300 35,520 42,624 44,400 47,360 53,280 57,600 59,200 66,600 71,040 85,248 88,800 106,560 118,400 133,200 142,080 177,600 213,120 236,800 266,400 355,200 426,240 532,800 710,400 1,065,600 and 2,131,200, with no remainder.
Since 2,131,200 cannot be divided by just 1 and 2,131,200, it is a composite number.