Properties of the Number 51871

Fifty-One Thousand Eight Hundred Seventy-One

Basics

Value: 51870 → 51871 → 51872

Parity: odd

Prime: Yes

Previous Prime: 51869

Next Prime: 51893

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 51871

Divisors: 1, 51871

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1100101010011111

Octal: 145237

Duodecimal: 26027

Hexadecimal: ca9f

Square: 2690600641

Square Root: 227.75205816852676

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

T(n,k)=Number of nXk arrays containing k copies of 0..n-1 with no equal vertical neighbors and new values introduced sequentially from 0. A265232

Smallest prime factor of n!-1 (for n>2), a(2)=1. A54415

Noncomposite numbers in the northern ray of the Ulam spiral as oriented on the March 1964 cover of Scientific American. A168023

T(n,k)=Number of nXk arrays containing k copies of 0..n-1 with no equal diagonal or antidiagonal neighbors and new values introduced sequentially from 0. A265656

a(n) = A000040(A096480(n)). A96481

Smaller of the two factors of the n-th semiprime number of the form m!-1. A80802

Number of n X 2 arrays containing 2 copies of 0..n-1 with no equal vertical neighbors and new values introduced sequentially from 0. A265229

Triangle read by rows giving the number of configurations of n indistinguishable pairs placed on the vertices of the ladder graph P₂ X P_n such that exactly k such pairs are joined by a horizontal edge. A325754

19-gonal (or enneadecagonal) numbers: n(17n-15)/2. A51871

Products of 6 distinct primes that are sandwiched between twin prime numbers. A378097