Properties of the Number 70217

Seventy Thousand Two Hundred Seventeen

Basics

Value: 70216 → 70217 → 70218

Parity: odd

Prime: No

Previous Prime: 70207

Next Prime: 70223

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 7 ² × 1433

Divisors: 1, 7, 49, 1433, 10031, 70217

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10001001001001001

Octal: 211111

Duodecimal: 34775

Hexadecimal: 11249

Square: 4930427089

Square Root: 264.9849052304678

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

The y member of the positive proper fundamental solution (x = x2(n), y = y2(n)) of the second class for the Pell equation x² - D(n)*y² = +8 for odd D(n) = A263012(n). A264353

Denominators of continued fraction convergents to sqrt(217). A41405

a(1) = 2; for n>=2, a(n) = 8·a(n-1) + 1. A132433

The integer partitions of n taken as digits in base n+1 and listed in the Hindenburg order. A157406

sec(tanh(x)*exp(x))=1+1/2!*x²+6/3!*x³+21/4!*x⁴+100/5!*x⁵... A12662

Odd numbers D not a square that admit proper solutions (x, y) to the Pell equation x² - D·y² = +8 with both·and y odd. A263012

Numbers not represented by a known atomic weight as given in Francis W. Aston's Nobel lecture in 1922. A70217

Number of (n+1) X 7 0..2 arrays with the number of clockwise edge increases in every 2 X 2 subblock equal to two. A205834