Divisor 21887

To determine if any number is divisible by 21887, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 43 and 509 - then it is divisible by 21887.

The following tests must pass:

• Test if a number is divisible by 43
• Test if a number is divisible by 509

Easy!