Properties of the Number 19172

Nineteen Thousand One Hundred Seventy-Two

Basics

Value: 19171 → 19172 → 19173

Parity: even

Prime: No

Previous Prime: 19163

Next Prime: 19181

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 2 ² × 4793

Divisors: 1, 2, 4, 4793, 9586, 19172

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100101011100100

Octal: 45344

Duodecimal: B118

Hexadecimal: 4ae4

Square: 367565584

Square Root: 138.4629914453678

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) = 3ⁿ - 2ⁿ + 1. A83323

T(n,k)=Half the number of (n+1)X(k+1) binary arrays with no 2X2 subblock containing exactly one 1. A184197

Number of ways to write prime(n) as sum of distinct divisors of prime(n)+1. A85496

a(n) = (1/4) * ∑_k=0..n (k+2) * binomial(2·k+2,2·n-2·k+1). A391829

Layer counting sequence for hyperbolic tessellation by cuspidal triangles of angles (π/3, π/5, π/7). A54887

Square roots of highly composite numbers, floored down: a(n) = A000196(A002182(n)). A263096

a(n) = ∑_k=0..n (-1)^n-k * k^3·n. A349902

"CGJ" (necklace, element, labeled) transform of 1,3,5,7... A32150

a(n) = prime(n)² - prime(n+1). A62235

Half the number of (n+1) X 2 binary arrays with no 2 X 2 subblock containing exactly one 1. A184189