Properties of the Number 23191

Twenty-Three Thousand One Hundred Ninety-One

Basics

Value: 23190 → 23191 → 23192

Parity: odd

Prime: No

Previous Prime: 23189

Next Prime: 23197

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 7 × 3313

Divisors: 1, 7, 3313, 23191

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 101101010010111

Octal: 55227

Duodecimal: 11507

Hexadecimal: 5a97

Square: 537822481

Square Root: 152.2859153040753

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

Smallest k such that k·2*p(n)²-1=q is prime, k·2*q²-1=r, k·2*r²-1=s, k·2*r²-1=t, r, s, and t are also prime. A224492

Number of Sommerville symmetrical cyclic compositions (on symmetric necklaces) of n that are Carlitz (adjacent parts on the circle are distinct). A292200

Positive numbers k such that -k, -(k + 1), and -(k + 2) are 3 consecutive negative negaFibonacci-Niven numbers (A331088). A331090

Number of symmetrically unique Dyck paths of semilength n and height nine. A291893

Partial sums of ceiling(Fibonacci(n)/2). A179018

Number of nondecreasing arrangements of n+2 numbers in 0..5 with each number being the sum mod 6 of two others. A183908

From the game of Quod: number of "squares" on an n X n array of points with the four corner points deleted. A124479

Partial sums of economical numbers A046759. A172460

Conjecturally, number of maximal infinitely-recurring prime patterns of width 2·n-1. A23191

Half the number of nX4 binary arrays with no element equal to a strict majority of its king-move neighbors. A183383