31
natural number
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Summary
31 is a positive integer[1]. 31 draws 1,659 Wikipedia views per month (positive integer category, ranking #95 of 724).[2]
Key Facts
- Instance of: prime number[3], Mersenne prime[4], odd number[5], centered triangular number[6], centered decagonal number[7], centered pentagonal number[8], highly touchable number[9], Mersenne number[10], primorial prime[11], Euclid number[12]
- Follows: 30[13]
- Followed by: 32[14]
- Commons category: 31 (number)[15]
- Unicode character: ㉛[16]
- Numeric value: 31[17]
- Code: ௩௰௧[18], ௩௧[19], XXXI[20], 𒌍𒐕[21], 11111[22], 1011[23], 133[24], 111[25], 51[26], 43[27], 34[28], 37[29], 31[30], 29[31]
- Prime factor: 31[32]
- Maintained by WikiProject: WikiProject Mathematics[33]
- Number of decimal digits: 2[34]
Why It Matters
31 has Wikipedia articles in 29 language editions, a strong signal of global cultural recognition.[35] 31 is known by 47 alternative names across languages and contexts.[36]