Properties of the Number -21864

Twenty-One Thousand Eight Hundred Sixty-Four

Basics

Value: -21865 → -21864 → -21863

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 2 ³ × 3 × 911

Divisors: 1, 2, 3, 4, 6, 8, 12, 24, 911, 1822

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -101010101101000

Octal: -52550

Duodecimal: -107A0

Hexadecimal: -5568

Square: 478034496

Square Root: 147.86480311419618

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

Expansion of 1/(1 - x³ - x⁴ + x⁷ - x¹⁰ - x¹¹ + x¹⁴) (a Salem polynomial). A143644

Number of integer partitions of n such that every orderless pair of distinct parts has a different sum. A325857

Starts of runs of 5 consecutive integers that are greedy Jacobsthal-Niven numbers (A364379). A364383

Starts of runs of 4 consecutive integers that are greedy Jacobsthal-Niven numbers (A364379). A364382

Numbers m such that m·reversal(m) contains every decimal digit exactly once. A178929

Number of (w,x,y) with all terms in {0,...,n} and the numbers w,x,y,|w-x|,|x-y|,|y-w| distinct. A213493

Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite MEP = Melanophlogite [Si46O92].qR starting with a T3 atom. A19155