Divisor 21239

To determine if any number is divisible by 21239, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 67 and 317 - then it is divisible by 21239.

The following tests must pass:

• Test if a number is divisible by 67
• Test if a number is divisible by 317

Easy!