Properties of the Number 22436

Twenty-Two Thousand Four Hundred Thirty-Six

Basics

Value: 22435 → 22436 → 22437

Parity: even

Prime: No

Previous Prime: 22433

Next Prime: 22441

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 2 ² × 71 × 79

Divisors: 1, 2, 4, 71, 79, 142, 158, 284, 316, 5609

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 101011110100100

Octal: 53644

Duodecimal: 10B98

Hexadecimal: 57a4

Square: 503374096

Square Root: 149.78651474682226

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

Numbers k such that σ(φ(k)) = σ(k) where σ is the sum of divisors function A000203 and φ is the Euler totient function A000010. A33631

Number of strongly connected directed multigraphs with loops allowed and with n arcs. A139627

E.g.f.: exp(x+x²/2)/(1-x). A130907

a(n) = (2·n+1)*(9·n+1). A33573

Numbers n such that σ(σ(φ(n))) = σ(σ(n)). A172466

Number of n X 6 0..1 arrays with no element equal to more than one of its horizontal and vertical neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards. A280438

a(n) = (3ⁿ - 1)/2. A3462

a(n) = (3ⁿ + 1)/2. A7051

Companion Pell numbers: a(n) = 2·a(n-1) + a(n-2), a(0) = a(1) = 2. A2203

Bisection of Lucas numbers: a(n) = L(2·n) = A000032(2·n). A5248