Properties of the Number 31311

Thirty-One Thousand Three Hundred Eleven

Basics

Value: 31310 → 31311 → 31312

Parity: odd

Prime: No

Previous Prime: 31307

Next Prime: 31319

Digit Sum: 9

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 7 ² × 71

Divisors: 1, 3, 7, 9, 21, 49, 63, 71, 147, 213

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 111101001001111

Octal: 75117

Duodecimal: 16153

Hexadecimal: 7a4f

Square: 980378721

Square Root: 176.94914523670354

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

a(n) = (2·n-1)*(n² -n +2)/2. A63488

Numbers m such that there are precisely 19 groups of order m. A298910

Number of homeomorphically irreducible (or series-reduced) trees with n pendant nodes, or continua with n non-cut points, or leaves. A7827

Numbers with multiplicative digital root value 9. A34056

a(n) = n²*(7·n - 5)/2. A262000

Numbers with at least 2 distinct digits and whose "rotations" (including the number itself) are multiples of these digits; repeated digits allowed but digit 0 not allowed. A66484

Smallest a(n) > a(n-1) such that a(n)²+a(n-1)² is a perfect square, with a(1)=5. A76671

Numbers that are divisible by the square of the sum of the squares of their digits. A379980

List of primitive words over the alphabet {1,3}. A213970

Nonmultiples of 10 that are divisible by the square of the sum of the squares of their digits. A379982