Properties of the Number -15523

Fifteen Thousand Five Hundred Twenty-Three

Basics

Value: -15524 → -15523 → -15522

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 19 ² × 43

Divisors: 1, 19, 43, 361, 817, 15523

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: -11110010100011

Octal: -36243

Duodecimal: -8B97

Hexadecimal: -3ca3

Square: 240963529

Square Root: 124.591331961738

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

Coefficients in the expansion of ([s] + [2s]x + [3s]x² + ...)/([r] + [2r]x + [3r]x² + ...); [ ] = floor, r = sqrt(3), s = sqrt(2). A279629

Smallest k > 0 with gcd(k, rev(k)) = n, where rev(k) is digit reversal of k, or 0 if no such k exists. A69554

Least number·such that xⁿ has n digits equal to k. Case k = 7. A285454

T(n,n), array T given by A047000. A47002

a(n) = n²*(2·n + 5). A163683

G.f. A(x) satisfies: x = ∑_n>=1 xⁿ * ∏_k=1..n A(-k·x). A266908

Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 313", based on the 5-celled von Neumann neighborhood. A271202

Three-column array giving list of primitive triples for integer-sided triangles with A < B < C < 2*π/3 and such that FA, FB, FC are also integers where F is the Fermat point of the triangle. A352360

Numbers k such that σ(k) = ψ(k) + τ(k)² + ω(k)³. A392520