Divisor 13223

To determine if any number is divisible by 13223, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 7 and 1889 - then it is divisible by 13223.

The following tests must pass:

• Test if a number is divisible by 7
• The "Justin Begley Test" for Divisibility by 1889

Easy!