Properties of the Number 21887

Twenty-One Thousand Eight Hundred Eighty-Seven

Basics

Value: 21886 → 21887 → 21888

Parity: odd

Prime: No

Previous Prime: 21881

Next Prime: 21893

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 43 × 509

Divisors: 1, 43, 509, 21887

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101010101111111

Octal: 52577

Duodecimal: 107BB

Hexadecimal: 557f

Square: 479040769

Square Root: 147.94255641971313

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

a(n) = ceiling(sqrt(n!)). A55228

a(1)= 1; a(2)= 5; thereafter a(n)= a(n-1) + a(n-2) + 5. A166863

Decimal representation of the diagonal from the origin to the corner of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 513", based on the 5-celled von Neumann neighborhood. A288812

Decimal representation of the diagonal from the origin to the corner of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 771", based on the 5-celled von Neumann neighborhood. A290231

a(n) = 38·n² - 1. A158596

a(n) = index of first appearance of n in A096862. A97008

Decimal representation of the n-th iteration of the "Rule 141" elementary cellular automaton starting with a single ON (black) cell. A267527

Numbers whose base-5 representation contains exactly three 0's and three 2's. A45187

From the binary representation of n: binomial(number of ones, number of blocks of contiguous ones). A136277

Decimal expansion of 1/883. A21887