Properties of the Number 31816

Thirty-One Thousand Eight Hundred Sixteen

Basics

Value: 31815 → 31816 → 31817

Parity: even

Prime: No

Previous Prime: 31799

Next Prime: 31817

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 2 ³ × 41 × 97

Divisors: 1, 2, 4, 8, 41, 82, 97, 164, 194, 328

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 111110001001000

Octal: 76110

Duodecimal: 164B4

Hexadecimal: 7c48

Square: 1012257856

Square Root: 178.3704011320264

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 all the parts in the partitions of n into 9 squarefree parts. A326523

a(n) = 2·a(n-1) + 14·a(n-2) for n>1, a(0)=1, a(1)=1. A133345

Numbers k such that the product of the digits of k is equal to the sum of the prime factors of k, counted with multiplicity. A65774

Number of walks within N³ (the first octant of Z³) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 1), (-1, 0, 0), (0, -1, 1), (0, 1, 1), (1, 1, -1)}. A149003

Irregular table read by rows: T(n,k) is the number of k-sided polygons formed, for k>=3, in a square when straight line segments connect the n+1 points along each edge that divide it into n equal parts to the n+1 points on the edge on the opposite side of the square. A355841

Square array whose rows have e.g.f. exp(x)*cosh(sqrt(k)*x), k>=0, read by ascending antidiagonals. A84097

Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 48 ones. A31816