Properties of the Number 15220

Fifteen Thousand Two Hundred Twenty

Basics

Value: 15219 → 15220 → 15221

Parity: even

Prime: No

Previous Prime: 15217

Next Prime: 15227

Digit Sum: 10

Digital Root: 1

Palindrome: No

Factorization: 2 ² × 5 × 761

Divisors: 1, 2, 4, 5, 10, 20, 761, 1522, 3044, 3805

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11101101110100

Octal: 35564

Duodecimal: 8984

Hexadecimal: 3b74

Square: 231648400

Square Root: 123.36936410632909

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) = n*(2·n² - 2·n + 1). A59722

Number of paraffins. A5997

a(n) = ceiling(n/2)*ceiling(n²/2). A131474

T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with every 2X2 subblock diagonal minus antidiagonal sum nondecreasing horizontally and vertically. A253456

Number of strict compositions of n that are neither increasing nor decreasing. A333149

Nonnegative values·of solutions (x, y) to the Diophantine equation x²+(x+761)² = y². A122694

G.f. satisfies A(x) = 1 + x / (1 + x·A(x))⁵. A365112

a(n) = n*(19·n + 1)/2. A22277

Structured truncated icosahedral numbers. A100154

Number of subsets of {1, 2, ..., n} containing n and having <=9 pairwise coprime elements. A186993