Properties of the Number 81244

Eighty-One Thousand Two Hundred Forty-Four

Basics

Value: 81243 → 81244 → 81245

Parity: even

Prime: No

Previous Prime: 81239

Next Prime: 81281

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 2 ² × 19 × 1069

Divisors: 1, 2, 4, 19, 38, 76, 1069, 2138, 4276, 20311

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011110101011100

Octal: 236534

Duodecimal: 3B024

Hexadecimal: 13d5c

Square: 6600587536

Square Root: 285.0333313842435

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

a(n) = 225·n² + n. A156814

a(n) = 361·n² + 19. A158592

Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 30. A31708

Named periods in the Mayan/Mesoamerican calendars. A81244