Your number, one digit away
One digit away
One change could reach Extreme.
Your number
21,331
Rare · Top 5.16%
Position 4: 3 → 2 · +289 points.
Gained: Triangular number, Digit sum 9, Descending segment, Harshad number, Happy number.
Lost: Digit sum 10, Semiprime.
44 legal neighbours · same digit length · no leading zeros. This describes an alternative number, not the odds of your next roll.