Properties of the Number 22391

Twenty-Two Thousand Three Hundred Ninety-One

Basics

Value: 22390 → 22391 → 22392

Parity: odd

Prime: Yes

Previous Prime: 22381

Next Prime: 22397

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 22391

Divisors: 1, 22391

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101011101110111

Octal: 53567

Duodecimal: 10B5B

Hexadecimal: 5777

Square: 501356881

Square Root: 149.63622556052394

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

Larger of two consecutive prime numbers such that p0+p1=average of twin prime pairs and p0·p1+7=average of twin prime pairs. A153375

Record-setting values of q(n), the minimal prime q such that n(q+1)-1 is a prime p (i.e., q(n) > q(j) for all 0 < j < n). A62256

a(n) = 4·n³ - 3·n² + 2·n - 1. A131464

Primes of the form p=3·q+3·r+q·r where q and r are distinct primes and 2·p-3·q, 2·p-3·r and 2·p-q·r are also prime. A328822

n²-79·n+1601 as n runs through the lucky numbers. A87867

Lesser prime in pair prime(k) +/- k for some k. A107636

Primes whose reversal - 1 is a square. A167218

The number of 2 X 2 symmetric positive definite matrices whose entries are integers x,y,z satisfying x² + y² + z² <= n². A219744

Fibonacci sequence beginning 1, 21. A22391