Properties of the Number 81422

Eighty-One Thousand Four Hundred Twenty-Two

Basics

Value: 81421 → 81422 → 81423

Parity: even

Prime: No

Previous Prime: 81421

Next Prime: 81439

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 2 × 11 × 3701

Divisors: 1, 2, 11, 22, 3701, 7402, 40711, 81422

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011111000001110

Octal: 237016

Duodecimal: 3B152

Hexadecimal: 13e0e

Square: 6629542084

Square Root: 285.34540472907565

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

Expansion of 1 / ((1-x)²*(1-x²)*(1-x³)*...*(1-x⁹)). A288344

Triangle read by rows in which row n consists of the first n+1 n-gonal numbers. A81422

Factors k > 1 such that the polynomial k·x² - 1 produces a record of its Hardy-Littlewood constant. A331947

Nonsquare factors k > 0 such that k·x² - 1 produces a new minimum of its Hardy-Littlewood constant. A331948