Properties of the Number 15521

Fifteen Thousand Five Hundred Twenty-One

Basics

Value: 15520 → 15521 → 15522

Parity: odd

Prime: No

Previous Prime: 15511

Next Prime: 15527

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 11 × 17 × 83

Divisors: 1, 11, 17, 83, 187, 913, 1411, 15521

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11110010100001

Octal: 36241

Duodecimal: 8B95

Hexadecimal: 3ca1

Square: 240901441

Square Root: 124.58330546265017

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) = ∑_k=0..n C(2k+2,k). A57552

Triangle read by rows: T(n,k) = number of noncommutative symmetric polynomials of degree n that have exactly k different variables appearing in each monomial and which generate the algebra of all noncommutative symmetric polynomials (n >= 1, 1 <= k <= n). A55105

Triangle T(k,n) giving number of symmetric polynomials of degree n in k noncommuting variables, n >=2, 2 <= k <= n. A55107

Expansion of 1/(1 - x³/(1-x)⁵). A369804

Triangle T(n,k) giving number of symmetric polynomials of degree n in k noncommuting variables, n >=2, 2 <= k <= n. A55106

a(n) = ∑_{k <= n/2} binomial(n-2k, 3k+1). A137357

a(n) = 1 + (144 + (50 + (35 + (10 + n)*n)*n)*n)*n/120. A145127

Partial sums of A224613. A365446

a(n) = 36·n² - 17·n + 2. A157265

a(n) = ∑_k=0..n (-1)^n-k*binomial(k,floor(k/2)). A86905