Properties of the Number 31171

Thirty-One Thousand One Hundred Seventy-One

Basics

Value: 31170 → 31171 → 31172

Parity: odd

Prime: No

Previous Prime: 31159

Next Prime: 31177

Digit Sum: 13

Digital Root: 4

Palindrome: No

Factorization: 7 × 61 × 73

Divisors: 1, 7, 61, 73, 427, 511, 4453, 31171

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 111100111000011

Octal: 74703

Duodecimal: 16057

Hexadecimal: 79c3

Square: 971631241

Square Root: 176.55310815729072

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) = 2ⁿ - Fibonacci(n+2). A8466

T(n,k)=Number of nXk 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1 or 4 neighboring 1s. A297582

Number of tilings of a 5 X n rectangle using n pentominoes of shapes L, U, I. A251737

a(n) = ∑_k=1..n k² * floor(n/k)³. A350124

The reversing binary representation of the sum of the divisors of the n-th odd square: a(n) = A065621(A379223(n)). A379224

Number of partitions of n+3 with largest inscribed rectangle having area <= n. A218624

Strong pseudoprimes to base 74. A20300

Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 43 ones. A31811

The same as A166461 except for a(1)=43. A166491

Number of nX5 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1 or 4 neighboring 1s. A297579