Divisor 22521

To determine if any number is divisible by 22521, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 3 and 7507 - then it is divisible by 22521.

The following tests must pass:

• Test if a number is divisible by 3
• The "Alistair Lovegrove Test" for Divisibility by 7507

Easy!