Properties of the Number 21932

Twenty-One Thousand Nine Hundred Thirty-Two

Basics

Value: 21931 → 21932 → 21933

Parity: even

Prime: No

Previous Prime: 21929

Next Prime: 21937

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 2 ² × 5483

Divisors: 1, 2, 4, 5483, 10966, 21932

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101010110101100

Octal: 52654

Duodecimal: 10838

Hexadecimal: 55ac

Square: 481012624

Square Root: 148.09456438370722

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) = Fibonacci(p) mod p², where p = prime(n). A236395

Expansion of b(2)*b(6)/(1 - 2·x + x³ - x⁴ - x⁵ + 2·x⁶), where b(k) = (1-x^k)/(1-x). A264079

Number of binary words w of length n for which s, the longest proper suffix of w that appears at least twice in w, is of length 1 (i.e., either s = 0 or s = 1). A284122

Number of (unlabeled) rooted trees with n leaf nodes and without unary nodes or outdegrees larger than eight. A292214

a(0) = 1; thereafter a(n) = 2*(6·n² - 3·n + 1). A386477

Coordination sequence for octagonal tiling is a(n) + A103908(n)*sqrt(2). A103909

Number of nonnegative solutions to x² + y² + z² < n². A218711

Central coefficients T(2n,n) of number triangle A176331. A176335

G.f. A(x) satisfies: [xⁿ] A_n(x) = [xⁿ] A_n-1(x) for n>2 where A_n+1(x) = A_n(A(x)) denotes iteration with A₀(x)=x. A177775

Decimal expansion of 1/928. A21932