Properties of the Number 18182

Eighteen Thousand One Hundred Eighty-Two

Basics

Value: 18181 → 18182 → 18183

Parity: even

Prime: No

Previous Prime: 18181

Next Prime: 18191

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 2 × 9091

Divisors: 1, 2, 9091, 18182

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100011100000110

Octal: 43406

Duodecimal: A632

Hexadecimal: 4706

Square: 330585124

Square Root: 134.8406466908254

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

Numbers k of the form a - b + c, such that k³ equals the decimal concatenation a//b//c and numbers k, b, and c have the same number of digits. A259379

Infinite sum of the natural numbers, compacted (see comments for an explanation). A336897

Integers k such that 1023·2^k - 1 is prime. A387926

Row 5 of square array defined in A047662. A47661

First quadrisection of A332843. A330522

Lexicographically earliest sequence of positive terms such that a(4n+1) is the sum of the next three terms, those three terms having the property that each of them is a substring of a(4n+1). A332843

Numbers k such that (29·10^k + 673)/9 is prime. A293825

Square array a(n,k) read by antidiagonals: a(n,1)=n, a(1,k)=k, a(n,k)=a(n-1,k-1)+a(n-1,k)+a(n,k-1)+1. A47662

Primes whose proper substrings of consecutive digits are all composite. A279366

Powers of fifth root of 23 rounded up. A18182