Properties of the Number 5821

Five Thousand Eight Hundred Twenty-One

Basics

Value: 5820 → 5821 → 5822

Parity: odd

Prime: Yes

Previous Prime: 5813

Next Prime: 5827

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 5821

Divisors: 1, 5821

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1011010111101

Octal: 13275

Duodecimal: 3451

Hexadecimal: 16bd

Square: 33884041

Square Root: 76.2954782408499

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

Primes p such that continued fraction of (1 + sqrt(p))/2 has period 15: primes in A146338. A146360

Numbers k such that (k! - 2)/2 is a prime. A82671

Primes congruent to 2 mod 23. A141908

Discriminants of real quadratic fields with form class number 3. A391421

Triangle read by rows: T(n,m) (n >= m >= 1) = number of vertices formed by drawing the lines connecting any two of the 2*(m+n) perimeter points of an m X n grid of squares. A331453

Mother primes of order 7. A136066

Positive numbers whose product of digits is 5 times their sum. A62382

Integers of the form c(n)/b(n) where c(n+1)=c(n)+(n+1)⁴ with c(0)=1 and b(n+1)=b(n)+(n+1)² with b(0)=1. A119617

a(n) = 15·n² - 9·n + 1. A134154

a(n) = n*(7·n + 11)/2 + 1. A198017