Numbers /21,316
How rare is 21,316?
21,316 scores 434 and sits in the Extreme tier — 1 in 167 of all supported numbers score this high or higher. Everything below is computed from a complete analysis of all 1,000,001 numbers in range.
RNGdle.net’s own rarity score. Top 0.60% means that proportion of supported numbers scores at least this high. Every exact number has the same chance of being rolled. Same-length rank keeps the score and compares only numbers with 5 digits, including ties. How this differs from EP · Badge guide
These notes make the number easy to read, but they add no score unless a separately counted rarity signal appears below.
An integer squared.
Factorization · signal frequency
This number's digits add up to an uncommon total.
Arithmetic · signal frequency
Every comparison strictly alternates between rising and falling.
Sequence · signal frequency
This number uses an uncommon count of distinct digits.
Repetition · signal frequency
Exactly one digit appears twice.
Repetition · signal frequency
Strongest signal: Perfect square. It appears in 1,001 supported numbers and contributes +199 after correlation decay.
Why is 21,316 unusual? Only 0.60% of the 1,000,001 supported numbers receive an equal or higher rarity score. This number falls in the Extreme tier. Scoring is grounded in the exact frequency of each detected trait — rarer traits carry more information and contribute more to the score.
Algorithm version 1.1.0
One digit away
One digit, +103 points.
Your number
21,316
Extreme · Top 0.60%
Position 5: 6 → 2 · +103 points.
Gained: Palindrome, Digit sum 9, 3 distinct digits, Harshad number, Double pair, Happy number.
44 legal neighbours · same digit length · no leading zeros. This describes an alternative number, not the odds of your next roll.
Explore & share this near miss →Similar interesting numbers
Explore a shared pattern, a comparable score, or a mathematical relationship. Every link explains its connection to 21,316.
Shared patterns
Same length, nearby scores
Patterns in this number
Each of these has its own page explaining how common the pattern is and why.
Numbers With One Repeated Digit
The mildest form of repetition: exactly one digit appears twice, and every other digit is distinct — as in 1231 or 405067.
Zigzag Digit Numbers
Every comparison changes direction: up, down, up, down — or the reverse. In 792619 the path is 7 < 9 > 2 < 6 > 1 < 9.
Perfect Squares
A perfect square is some whole number times itself: 144 = 12², 10000 = 100². The range ends neatly on 1,000,000 = 1000².