Properties of the Number 31207

Thirty-One Thousand Two Hundred Seven

Basics

Value: 31206 → 31207 → 31208

Parity: odd

Prime: No

Previous Prime: 31193

Next Prime: 31219

Digit Sum: 13

Digital Root: 4

Palindrome: No

Factorization: 11 × 2837

Divisors: 1, 11, 2837, 31207

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 111100111100111

Octal: 74747

Duodecimal: 16087

Hexadecimal: 79e7

Square: 973876849

Square Root: 176.6550310633694

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

Sum of squares of first n positive integers congruent to 1 mod 3. A24215

Fibonacci sequence beginning 1, 31. A22401

Number of nonempty subsets of {1, 2, ..., n} with <=10 pairwise coprime elements. A187271

Number of lower triangular n X n arrays colored with integers 0 upwards introduced in row major order, with no element equal to any horizontal, vertical or antidiagonal neighbor, and containing the value n(n+1)/2-2. A211924

Records in A098550. A248647

Numbers k such that w(k), w(k+1), and w(k+2) are all odd, where w is A360519. A361106

Base-4 digits are, in order, the first n terms of the periodic sequence with initial period 1,3,2. A37611

Number of length 3 0..n arrays with each partial sum starting from the beginning no more than sqrt(3) standard deviations from its mean. A244942

Sequence of distinct least positive numbers such that the average of the first n terms is a Fibonacci number. A248982

Number of (n+1)X(3+1) 0..3 arrays with no element unequal to a strict majority of its horizontal and antidiagonal neighbors, with values 0..3 introduced in row major order. A231446