Properties of the Number 22086

Twenty-Two Thousand Eighty-Six

Basics

Value: 22085 → 22086 → 22087

Parity: even

Prime: No

Previous Prime: 22079

Next Prime: 22091

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 × 3 ³ × 409

Divisors: 1, 2, 3, 6, 9, 18, 27, 54, 409, 818

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 101011001000110

Octal: 53106

Duodecimal: 10946

Hexadecimal: 5646

Square: 487791396

Square Root: 148.61359291801003

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) is the (n+1)st (n+2)-gonal number. A64808

a(1) = 1; a(n) = least number such that the concatenation a(n)a(n-1)...a(2)a(1) is a square. A61359

a(1) = 0; for n > 1, a(n) is the smallest integer > 0 such that the concatenation a(n)a(n-1)...a(2)a(1) is a square. A65691

Triangle read by rows where the n-th row is the first row of Mⁿ, with M the (n+1)-by-(n+1) matrix with (3,1,3,1,3,1,...) on its main diagonal and (1,3,1,3,1,3,...) on its superdiagonal. A124573

Define the sequence S(a(0),a(1)) by a(n+2) is the least integer such that a(n+2)/a(n+1) > a(n+1)/a(n) for n >= 0. This is S(5,20). A22021

Number of directed site animals on hexagonal net (honeycomb) with n sites. A55919

a(1) = 81; for n > 1, a(n) is the smallest integer > 0 such that the concatenation a(n)a(n-1)...a(2)a(1) is a square. A65793

Number of reduced words of length n in Coxeter group on 3 generators S_i with relations (S_i)² = (S_i S_j)⁷ = I. A164352

37-gonal numbers: a(n) = n*(35·n-33)/2. A282852

Numbers k such that (86·10^k + 121)/9 is prime. A283185