Step 1: Divide the number into separate digits:
06130 => 0 6 1 3 0
Step 2: Calculate the distance between each digit and the next (the last digit with the first):
0 to 6 = 6
6 to 1 = 5
1 to 3 = 2
3 to 0 = 3
0 to 0 = 0
Step 3: Combine the filters to a string:
6 5 2 3 0 = 65230