Properties of the Number 81493

Eighty-One Thousand Four Hundred Ninety-Three

Basics

Value: 81492 → 81493 → 81494

Parity: odd

Prime: No

Previous Prime: 81463

Next Prime: 81509

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 227 × 359

Divisors: 1, 227, 359, 81493

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

5184 Try Today's Challenge

Representations

Binary: 10011111001010101

Octal: 237125

Duodecimal: 3B1B1

Hexadecimal: 13e55

Square: 6641109049

Square Root: 285.46978824387

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

Number of multiples of n which have only distinct and nonzero digits in base 10. A328287

Number of isomorphism classes of reduced Witt rings of fields with 2n orderings. A213331

Number of isomorphism classes of reduced Witt rings of fields with n orderings. A213332

Number of integer partitions of n with frequency depth floor(sqrt(n)). A325252

a(n) = greatest number in row n of the array in A225485. A364810

Triangle T(n,k) read by rows in which the n-th row begins with T(n,1) = n and contains n terms of an arithmetic progression with a common difference of (n-1). A81493

Number of n X 1 1..4 arrays with no element with value z exactly a city block distance of z from another element with value z. A210781