Properties of the Number 19165

Nineteen Thousand One Hundred Sixty-Five

Basics

Value: 19164 → 19165 → 19166

Parity: odd

Prime: No

Previous Prime: 19163

Next Prime: 19181

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 5 × 3833

Divisors: 1, 5, 3833, 19165

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100101011011101

Octal: 45335

Duodecimal: B111

Hexadecimal: 4add

Square: 367297225

Square Root: 138.43771162512041

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

Values of n such that L(20) and N(20) are both prime, where L(k) = (n²+n+1)*2^2·k + (2·n+1)*2^k + 1, N(k) = (n²+n+1)*2^k + n. A227523

T(n,k)=Number of (n+2)X(k+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 3 5 6 or 8 and every 3X3 column and antidiagonal sum not equal to 0 3 5 6 or 8. A252615

a(n) = 14·n² - 1. A158485

Main diagonal of array A255551. A255550

Triangle read by rows: T(n,k) is the number of secondary structures of size n having k stacks of length 2 (n>=0, k>=0). A202841

Number of secondary structures of size n having no stacks of length 2. A202842

Numbers k such that the continued fraction for sqrt(k) has period 97. A20436

Round(1000·x), where·is the solution to x = 5^n-x. A104744

Number of length 5+2 0..n arrays with every three consecutive terms having the sum of some two elements equal to twice the third. A248438

Number of (n+2)X(1+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 3 5 6 or 8 and every 3X3 column and antidiagonal sum not equal to 0 3 5 6 or 8. A252608