Properties of the Number 81481

Eighty-One Thousand Four Hundred Eighty-One

Basics

Value: 81480 → 81481 → 81482

Parity: odd

Prime: No

Previous Prime: 81463

Next Prime: 81509

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 17 × 4793

Divisors: 1, 17, 4793, 81481

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011111001001001

Octal: 237111

Duodecimal: 3B1A1

Hexadecimal: 13e49

Square: 6639153361

Square Root: 285.44876948412303

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

Antidiagonal sums of the convolution array A213762. A213764

Growth series for affine Coxeter group B₇. A267170

Number of (binary) bit strings of length n having an even length block of 0's followed by an odd length block of 1's. A65506

Consider the mapping f(a/b) = (a³ +b³)/(a²+b²). Taking a =1, b = 2 to start with and carrying out this mapping repeatedly on each new (reduced) rational number gives the following sequence 1/2,9/5,427/53,39001680/92569,... Sequence contains the numerator. A81481