Step 1: Divide the number into separate digits:
85163 => 8 5 1 6 3
Step 2: Calculate the distance between each digit and the next (the last digit with the first):
8 to 5 = 3
5 to 1 = 4
1 to 6 = 5
6 to 3 = 3
3 to 8 = 5
Step 3: Combine the filters to a string:
3 4 5 3 5 = 34535