Properties of the Number 19215

Nineteen Thousand Two Hundred Fifteen

Basics

Value: 19214 → 19215 → 19216

Parity: odd

Prime: No

Previous Prime: 19213

Next Prime: 19219

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 5 × 7 × 61

Divisors: 1, 3, 5, 7, 9, 15, 21, 35, 45, 61

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100101100001111

Octal: 45417

Duodecimal: B153

Hexadecimal: 4b0f

Square: 369216225

Square Root: 138.61818062577507

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) = (n⁴ + n)/2 (Row sums of an n X n X n magic cube, when it exists). A27441

Odd primitive abundant numbers. A6038

T(n,k)=Number of nXk 0..1 arrays with every element equal to 1, 2, 3 or 4 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. A302381

Irregular triangle of odd primitive abundant numbers (A006038) in which row n has numbers with n distinct prime factors. A188439

Odd recursive abundant numbers: odd numbers k such that A333926(k) > 2·k. A333950

Primitive terms of A388034. A388035

Numbers of the form k*(k³ +- 1)/2. A57590

Odd nonsquarefree numbers k such that {sum of unitary divisors of k} plus {sum of squarefree divisors of k} >= 2·k. A389079

Stirling-like number triangle defined by the sequence A000292=C(n+3,3). A80249

Expansion of 1/((1-x)(1-4x)(1-10x)(1-20x)). A80250