Properties of the Number 81484

Eighty-One Thousand Four Hundred Eighty-Four

Basics

Value: 81483 → 81484 → 81485

Parity: even

Prime: No

Previous Prime: 81463

Next Prime: 81509

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 2 ² × 13 × 1567

Divisors: 1, 2, 4, 13, 26, 52, 1567, 3134, 6268, 20371

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011111001001100

Octal: 237114

Duodecimal: 3B1A4

Hexadecimal: 13e4c

Square: 6639642256

Square Root: 285.4540243191537

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

Consider the mapping f(a/b) = (a² + b)/(a² - b). Taking a =2, b = 1 to start with and carrying out this mapping repeatedly on each new (reduced) rational number gives the following sequence 2/1,5/3,14/11,207/185,... Sequence contains the denominators. A81484

Number of (n+1) X (4+1) 0..2 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing absolute value of x(i,j)-x(i-1,j) in the j direction. A250894