Properties of the Number 53228

Fifty-Three Thousand Two Hundred Twenty-Eight

Basics

Value: 53227 → 53228 → 53229

Parity: even

Prime: No

Previous Prime: 53201

Next Prime: 53231

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 2 ² × 7 × 1901

Divisors: 1, 2, 4, 7, 14, 28, 1901, 3802, 7604, 13307

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1100111111101100

Octal: 147754

Duodecimal: 26978

Hexadecimal: cfec

Square: 2833219984

Square Root: 230.71194160684445

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 <= n/2} binomial(n-2k, 3k). A137356

Numerators of increasingly better rational approximations to π with increasing denominators (3/1, 13/4, 16/5, 19/6, 22/7, 179/57, ...) A63674

Number of compositions of 5·n-1 into parts 3 and 5. A369846

The next smallest pair of numbers is taken so that a(2n-1)/a(2n) converges to π. A57082

a(n) = ∑_{k=0..floor((2·n+1)/3)} binomial(2·k+1,2·n-3·k+1). A391600

Arises in enumerating non-degenerate colorings in Brook's Theorem. A152390

Number of (n+2)X(n+2) 0..3 arrays with every consecutive three elements in every row and diagonal having exactly two distinct values, and in every column and antidiagonal not having exactly two distinct values, and new values 0 upwards introduced in row major order. A252711

n for which second differences of σ(n) are positive. A53228