Your number, one digit away
One digit away
One change could reach Singular.
Your number
521
Extreme · Top 0.18%
Position 1: 5 → 1 · +478 points.
Gained: Digit sum 4, Perfect square, Palindrome, 2 distinct digits, Semiprime, Repeated digit.
Lost: Digit sum 8, Prime, 3 distinct digits.
26 legal neighbours · same digit length · no leading zeros. This describes an alternative number, not the odds of your next roll.