Properties of the Number 21853

Twenty-One Thousand Eight Hundred Fifty-Three

Basics

Value: 21852 → 21853 → 21854

Parity: odd

Prime: No

Previous Prime: 21851

Next Prime: 21859

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 13 × 41 ²

Divisors: 1, 13, 41, 533, 1681, 21853

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101010101011101

Octal: 52535

Duodecimal: 10791

Hexadecimal: 555d

Square: 477553609

Square Root: 147.82760229402356

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 labeled simple graphs covering n vertices and contradicting a strict version of the axiom of choice. A367868

Small-number statistic from the enumeration of domino tilings of a 3-pillow of order n. A112835

a(n) = floor(sqrt(a(n-1)² + a(n-2)²)), a(1)=1, a(2)=3. A104803

T(n,k)=Number of (n+1)X(k+1) arrays of permutations of 0..(n+1)*(k+1)-1 with each element having index change +-(.,.) 0,0 0,2 or 1,0. A264207

Expansion of (5 + 3·x + x² - x³) / (1 - 2·x - 2·x² - 2·x³ + x⁴) in powers of x. A71100

Partial sums of A005578. A86445

Constant term of the reduction by x² -> x+1 of the polynomial p(n,x) defined at Comments. A192960

Decimal representation of the x-axis, from the origin to the right edge, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 161", based on the 5-celled von Neumann neighborhood. A279501

Numbers k such that σ(k) = ψ(k) + τ(k) + ω(k)³. A392263

a(n) = 12·n² - 8·n + 9. A167585