Divisor 25581

To determine if any number is divisible by 25581, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 3 and 8527 - then it is divisible by 25581.

The following tests must pass:

• Test if a number is divisible by 3
• The "Joel Blackman-Mathis Test" for Divisibility by 8527

Easy!