Properties of the Number 21863

Twenty-One Thousand Eight Hundred Sixty-Three

Basics

Value: 21862 → 21863 → 21864

Parity: odd

Prime: Yes

Previous Prime: 21859

Next Prime: 21871

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 21863

Divisors: 1, 21863

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101010101100111

Octal: 52547

Duodecimal: 1079B

Hexadecimal: 5567

Square: 477990769

Square Root: 147.8614216082072

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

Number of multiset partitions of uniform multisets of size n whose union is an initial interval of positive integers. A322784

A set of nine consecutive primes forming a 3 X 3 semimagic square with the smallest magic constant (65573). A265614

Denominators of continued fraction convergents to sqrt(913). A42765

Primes p such that (p²⁵⁶ + 1)/2 is prime. A341234

Second term of weak prime sextet: p(m)-p(m-1) < p(m+1)-p(m) < p(m+2)-p(m+1) < p(m+3)-p(m+2) < p(m+4)-p(m+3). A54829

Lesser of consecutive primes whose sum is a palindromic number. A242386

Primes of the form p=3·q+3·r+q·r where q and r are distinct primes and 2·p-3·q, 2·p-3·r and 2·p-q·r are also prime. A328822

Primes p such that 2·p⁵-+3 are also prime. A174368

Primes p such that 12·p²-1 and 16·p³-1 are also primes. A193051

Smallest known example of a 3 X 3 X 3 generalized arithmetic progression (GAP) of 27 primes, listed in increasing order. A290967