Properties of the Number 51228

Fifty-One Thousand Two Hundred Twenty-Eight

Basics

Value: 51227 → 51228 → 51229

Parity: even

Prime: No

Previous Prime: 51217

Next Prime: 51229

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 ² × 3 ² × 1423

Divisors: 1, 2, 3, 4, 6, 9, 12, 18, 36, 1423

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1100100000011100

Octal: 144034

Duodecimal: 25790

Hexadecimal: c81c

Square: 2624307984

Square Root: 226.33603336632018

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

Solution of the complementary equation a(n) = a(n-1) + a(n-2) + b(n-2)*b(n), where a(0) = 3, a(1) = 4, b(0) = 1, b(1) = 2, b(2) = 5, and (a(n)) and (b(n)) are increasing complementary sequences. A296271

G.f.: x*(1+x+x²)*(1+6·x+8·x²+4·x³-x⁴)/((1+x)²*(1-x)⁴). A147691

Triangle read by rows: T(n,k) is the number of weighted lattice paths B(n) having k uudd strings. A247297

a(1) = 1; a(m+1) = ∑_{k=1 to m} [max(m, a(k))]. A56112

Numbers m such that the Bernoulli number B_m has denominator 42. A51228