Properties of the Number 22087

Twenty-Two Thousand Eighty-Seven

Basics

Value: 22086 → 22087 → 22088

Parity: odd

Prime: No

Previous Prime: 22079

Next Prime: 22091

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 13 × 1699

Divisors: 1, 13, 1699, 22087

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101011001000111

Octal: 53107

Duodecimal: 10947

Hexadecimal: 5647

Square: 487835569

Square Root: 148.6169573097229

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

T(n,k)=Number of nXk 0..1 arrays with every element equal to 0, 1, 2, 3, 4, 5 or 7 king-move adjacent elements, with upper left element zero. A299661

a(n) = (n³ - 2·n² + 3·n + 2)/2. A189890

a(n) = A189912(n-1)-a(n-1) for n>0, a(0) = 1; extended Riordan numbers. A194588

Number of nX4 0..1 arrays with every element equal to 0, 1, 2, 3, 4, 5 or 7 king-move adjacent elements, with upper left element zero. A299657

Number of n X n 0..1 arrays with every element equal to 0, 1, 2, 3, 4, 5 or 7 king-move adjacent elements, with upper left element zero. A299655

Fibonacci sequence beginning 0, 4. A22087

Number of 4X4X4 triangular 0..n arrays with no element lying outside the (possibly reversed) range delimited by its sw and se neighbors, and no element equal to its horizontal neighbors. A214386