Properties of the Number 40209

Forty Thousand Two Hundred Nine

Basics

Value: 40208 → 40209 → 40210

Parity: odd

Prime: No

Previous Prime: 40193

Next Prime: 40213

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 3 × 13 × 1031

Divisors: 1, 3, 13, 39, 1031, 3093, 13403, 40209

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1001110100010001

Octal: 116421

Duodecimal: 1B329

Hexadecimal: 9d11

Square: 1616763681

Square Root: 200.52181926164545

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) = 324·n² - 564·n + 321 (n>=1). A304617

Expansion of -1/(1 - x)² + (1/(1 - x))*∏_k>=1 (1 + x^k). A317910

Number of ways, counted up to symmetry, to build a contiguous building with n LEGO blocks of size 1 X 4 which is flat, i.e., with all blocks in parallel position and symmetric after a rotation by 180 degrees. A123781

Continued fraction for sqrt(224). A40209