Properties of the Number 47172

Forty-Seven Thousand One Hundred Seventy-Two

Basics

Value: 47171 → 47172 → 47173

Parity: even

Prime: No

Previous Prime: 47161

Next Prime: 47189

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 2 ² × 3 × 3931

Divisors: 1, 2, 3, 4, 6, 12, 3931, 7862, 11793, 15724

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1011100001000100

Octal: 134104

Duodecimal: 23370

Hexadecimal: b844

Square: 2225197584

Square Root: 217.19116004110296

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

Concatenation of n, n+1, n+2 divided by 3. A74991

All 81 combinations of prefixing and following a(n) by a single digit are nonprime. A32734

Sum{T(n-k,k)}, 0<=k<=[ n/2 ], where T is the array in A026374. A26385

Composite numbers k such that all the decimal concatenations ik and ikj (i, j = 1...9) are also composite. A32737

Number of active (ON, black) cells at stage 2ⁿ-1 of the two-dimensional cellular automaton defined by "Rule 390", based on the 5-celled von Neumann neighborhood. A271599

Number of nonempty subsets of {1,2,...,n} in which exactly 1/3 of the elements are <= (n-1)/2. A47172