Step 1: Divide the number into separate digits:
57910 => 5 7 9 1 0
Step 2: Calculate the distance between each digit and the next (the last digit with the first):
5 to 7 = 2
7 to 9 = 2
9 to 1 = 8
1 to 0 = 1
0 to 5 = 5
Step 3: Combine the filters to a string:
2 2 8 1 5 = 22815