Your number, one digit away
One digit away
One change could reach Singular.
Your number
21,515
Rare · Top 8.33%
Position 1: 2 → 5 · +540 points.
Gained: ABAB pattern, Palindrome, Only two distinct digits, Digit sum 17, 2 distinct digits, Semiprime, Triple digit.
Lost: Digit sum 14, 3 distinct digits, Double pair.
44 legal neighbours · same digit length · no leading zeros. This describes an alternative number, not the odds of your next roll.