Properties of the Number 21449

Twenty-One Thousand Four Hundred Forty-Nine

Basics

Value: 21448 → 21449 → 21450

Parity: odd

Prime: No

Previous Prime: 21433

Next Prime: 21467

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 89 × 241

Divisors: 1, 89, 241, 21449

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 101001111001001

Octal: 51711

Duodecimal: 104B5

Hexadecimal: 53c9

Square: 460059601

Square Root: 146.4547711752676

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

Array read by antidiagonals: T(m,n) = number of dominating sets in the stacked prism graph C_m X P_n. A286514

Expansion of ∏_k>=1 1/((1 - x^k) * (1 - x^2·k) * (1 - x^3·k)). A327042

Number of dominating sets in the stacked prism graph C₃ X P_n. A285880

a(n) is the number of 4 element sets of integer sided trapezoids with distinct areas and base angles that are 60 degrees, which fill an equilateral triangular grid of side n units. A389518

Nonprime terms in A210494. A230214

Numbers k such that the continued fraction for sqrt(k) has period 59. A20398

Number of increasing sequences of n integers x(1),...,x(n) with values in 1..5·n such that x(j) divides x(k) iff j divides k. A180382

Sum of the diagonal entries of the table of marks of the alternating group. A218920

Decimal expansion of 1/445. A21449