Properties of the Number 50821

Fifty Thousand Eight Hundred Twenty-One

Basics

Value: 50820 → 50821 → 50822

Parity: odd

Prime: Yes

Previous Prime: 50789

Next Prime: 50833

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 50821

Divisors: 1, 50821

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1100011010000101

Octal: 143205

Duodecimal: 254B1

Hexadecimal: c685

Square: 2582774041

Square Root: 225.43513479491168

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

Indices of primes at which the prime race 4k-1 vs. 4k+1 is tied. A38691

The number of regions inside a concave circular triangle formed by the straight line segments mutually connecting all vertices and all points that divide the sides into n equal parts. A340685

Numbers m such that numbers m, m + 1, m + 2 and m + 3 have k, 2k, 3k and 4k divisors respectively. A340157

Prime numbers whose central digit equals the sum of the other digits. A235119

Primes p such that p, p + 1, p + 2 and p + 3 have 2, 4, 6 and 8 divisors respectively. A340871

Numbers k such that d(k) < d(k+1) < d(k+2) < d(k+3) < d(k+4), where d(n) is the number of divisors of n. A364717

The n-th term of the sequence is the last term of n's trajectory under the "multiply with zero" rules explained in A365993. A365994

Centered heptagonal prime numbers. A144974

Terms k of A112998 such that k+2 is nonsquarefree. A328160

Even numbers in the sequence generated by a(n)=|a(n-1)+2a(n-2)-n| where a(0)=a(1)=1. A50821