Properties of the Number 87218

Eighty-Seven Thousand Two Hundred Eighteen

Basics

Value: 87217 → 87218 → 87219

Parity: even

Prime: No

Previous Prime: 87211

Next Prime: 87221

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 2 × 43609

Divisors: 1, 2, 43609, 87218

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10101010010110010

Octal: 252262

Duodecimal: 42582

Hexadecimal: 154b2

Square: 7606979524

Square Root: 295.3269374777723

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) = (sum of first n primes)² + sum of (squares of first n primes). A65762

Semiprimes A001358(k) = p·q such that p·q+p+q and r·s+r+s are consecutive primes, where A001358(k+1)=r·s. A330478

Satisfies A(x) = 1 + x·A(x)*f(x)², where f(x) = ∑_k>=0 x^(3ⁿ-1/2) and f(x)² = 2 - f(x²) + 2*∑_n>0 x^A023745(n). A87218