Properties of the Number 47815

Forty-Seven Thousand Eight Hundred Fifteen

Basics

Value: 47814 → 47815 → 47816

Parity: odd

Prime: No

Previous Prime: 47809

Next Prime: 47819

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 5 × 73 × 131

Divisors: 1, 5, 73, 131, 365, 655, 9563, 47815

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1011101011000111

Octal: 135307

Duodecimal: 23807

Hexadecimal: bac7

Square: 2286274225

Square Root: 218.6664126014784

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) = a(n-1) + 2·a(n-2) - a(n-3) - a(n-4) + 2·a(n-5) - 2·a(n-7) for n>7 and where a(0)=2, a(1)=3, a(2)=6, a(3)=10, a(4)=17, a(5)=29, a(6)=51. A285665

Matrix product of unsigned Stirling1-triangle |A008275(n,k)| and Stirling1-triangle A008275(n,k). A79642

T(n, k) = [x^k] ∑_k=0..n |Stirling1(n, k)|*FallingFactorial(x, k), triangle read by rows, for n >= 0 and 0 <= k <= n. A325873

Erroneous version of A095844. A47815