Your number, one digit away

One digit away

One change could reach Extreme.

Position 3: 0 → 1 · +310 points.

Gained: Triangular number, Digit sum 9, Descending segment, Harshad number, Happy number.

Lost: Digit sum 8.

53 legal neighbours · same digit length · no leading zeros. This describes an alternative number, not the odds of your next roll.