Step 1: Divide the number into separate digits:
52992 => 5 2 9 9 2
Step 2: Calculate the distance between each digit and the next (the last digit with the first):
5 to 2 = 3
2 to 9 = 7
9 to 9 = 0
9 to 2 = 7
2 to 5 = 3
Step 3: Combine the filters to a string:
3 7 0 7 3 = 37073