Properties of the Number 21343

Twenty-One Thousand Three Hundred Forty-Three

Basics

Value: 21342 → 21343 → 21344

Parity: odd

Prime: No

Previous Prime: 21341

Next Prime: 21347

Digit Sum: 13

Digital Root: 4

Palindrome: No

Factorization: 7 × 3049

Divisors: 1, 7, 3049, 21343

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101001101011111

Octal: 51537

Duodecimal: 10427

Hexadecimal: 535f

Square: 455523649

Square Root: 146.0924364914214

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) = a(1)*a(n-1) + a(2)*a(n-2) + ... + a(n-1)*a(1) for n >= 4. A25262

Number of words of length n in a simple grammar. A56010

Expansion of ∏_k>=1 (∏_j=1..k 1/(1 - x^k·j)^j). A327066

Least number having exactly two odd prime factors that differ by 2·n². A190052

Triangle T, read by rows, such that diagonal n equals column 0 of Tⁿ⁺¹, the (n+1)-th matrix power of T. A98447

E.g.f. satisfies: A(x) = exp(x·A(tan(x))). A141628

Number of nX2 0..4 arrays with every nonzero element less than or equal to at least two horizontal and vertical neighbors. A203340

Diagonal of the rational function 1/(1 - x - y - z - x y + x z - x y z). A274670

Decimal expansion of 1/339. A21343