Properties of the Number 81186

Eighty-One Thousand One Hundred Eighty-Six

Basics

Value: 81185 → 81186 → 81187

Parity: even

Prime: No

Previous Prime: 81181

Next Prime: 81197

Digit Sum: 24

Digital Root: 6

Palindrome: No

Factorization: 2 × 3 × 7 × 1933

Divisors: 1, 2, 3, 6, 7, 14, 21, 42, 1933, 3866

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 10011110100100010

Octal: 236442

Duodecimal: 3AB96

Hexadecimal: 13d22

Square: 6591166596

Square Root: 284.93157073234266

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) = 159·2ⁿ - 222 (n>=1). A304515

Lower Wythoff values for sequence A185615(n). A185616

G.f. satisfies: A(x) = 1 + x·A(x) * ( d/dx x·A(x)⁴ ). A317354

Expansion of (1-x)/(1-x-x²-x³+x⁴). A52527

Numbers k such that k and k² use only the digits 1, 5, 6, 8 and 9. A137062

4th binomial transform of (1,0,1,0,1,...), A059841. A81186

G.f. A(x) satisfies: A(x) = 1 + x·A(x)² / (A(x) - 4·x*A'(x)). A352238