Properties of the Number 22687

Twenty-Two Thousand Six Hundred Eighty-Seven

Basics

Value: 22686 → 22687 → 22688

Parity: odd

Prime: No

Previous Prime: 22679

Next Prime: 22691

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 7 ² × 463

Divisors: 1, 7, 49, 463, 3241, 22687

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101100010011111

Octal: 54237

Duodecimal: 11167

Hexadecimal: 589f

Square: 514699969

Square Root: 150.6220435394501

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

Starts of runs of 4 consecutive Gray-code Niven numbers (A344341). A344344

Number of tilings of a 12 X n rectangle using 2·n copies of the disconnected shape [ooo___ooo]. A323423

a(n) = ∑_j=1..n ∑_k=1..n φ(j·k) / φ(k). A372636

Starts of runs of 3 consecutive numbers that have an equal number of unitary and nonunitary prime divisors (A348097). A348099

Discriminants of quintic fields with 2 complex conjugates (negated). A23684

Expansion of ∑_{p prime, i>=1} x^pⁱ/(1 - x^pⁱ) / ∏_{p prime, j>=1} (1 - x^{p^j}). A281616

a(n) is the minimum sum of a nonnegative integer 4-tuple that takes n moves to reach a 0 component, where a move picks two components, subtracts the smaller from the larger, and doubles the smaller. A383586

Expansion of ∏_m>=1 (1-m·q^m)²⁷. A22687

Number of ways to arrange 6 nonattacking triangular rooks on an n X n X n triangular grid. A193984