Q: Is 21,855 a Composite Number?
A: Yes, 21,855 is a composite number.
The number 21,855 can be evenly divided by 1 3 5 15 31 47 93 141 155 235 465 705 1,457 4,371 7,285 and 21,855, with no remainder.
Since 21,855 cannot be divided by just 1 and 21,855, it is a composite number.