Step 1: Divide the number into separate digits:
85317 => 8 5 3 1 7
Step 2: Calculate the distance between each digit and the next (the last digit with the first):
8 to 5 = 3
5 to 3 = 2
3 to 1 = 2
1 to 7 = 6
7 to 8 = 1
Step 3: Combine the filters to a string:
3 2 2 6 1 = 32261