Properties of the Number 51282

Fifty-One Thousand Two Hundred Eighty-Two

Basics

Value: 51281 → 51282 → 51283

Parity: even

Prime: No

Previous Prime: 51263

Next Prime: 51283

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 × 3 ² × 7 × 11 × 37

Divisors: 1, 2, 3, 6, 7, 9, 11, 14, 18, 21

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1100100001010010

Octal: 144122

Duodecimal: 25816

Hexadecimal: c852

Square: 2629843524

Square Root: 226.45529360118744

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

Smallest k such that concatenation of r·k and 1 is a prime for all r = 1 to n but not prime for r = n+1, or smallest k such that 10·r*k+1 is a prime for all r = 1 to n but not prime for r = n+1. A100986

Number of partitions of n such that the number of parts having multiplicity >1 is a part and the number of distinct parts is a part. A241409

Non-palindromic numbers n such that φ(n) = φ(reversal(n)). A97647

Smallest k such that concatenation of r·k and 1 is a prime for all r = 1 to n, or smallest k such that 10·r*k +1 is a prime for all r = 1 to n. A89323

a(n) = (n + 1!)*(n² + 2!)*(n³ + 3!)/3!. A131682

Smallest member of bi-unitary sociable quadruples. A319915

Even numbers k such that the central binomial coefficient A000984(k, k/2) is divisible by k². A80395

Number of 0..n arrays of length 7 with each element differing from at least one neighbor by 1 or less, starting with 0. A221686

a(n-5) is the number of nonempty subsets of {1,2,...,n} such that the difference of successive elements is at least 5. A330910

2-adic valuation of A025487: largest k such that 2^k divides A025487(n), where A025487 gives products of primorials. A51282