Divisor 15021

To determine if any number is divisible by 15021, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 9 and 1669 - then it is divisible by 15021.

The following tests must pass:

• Test if a number is divisible by 9
• The "Dylan Prosser Test" for Divisibility by 1669

Easy!