Properties of the Number 85320

Eighty-Five Thousand Three Hundred Twenty

Basics

Value: 85319 → 85320 → 85321

Parity: even

Prime: No

Previous Prime: 85313

Next Prime: 85331

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 ³ × 3 ³ × 5 × 79

Divisors: 1, 2, 3, 4, 5, 6, 8, 9, 10, 12

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: Yes

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Representations

Binary: 10100110101001000

Octal: 246510

Duodecimal: 41460

Hexadecimal: 14d48

Square: 7279502400

Square Root: 292.09587467131405

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) = 1² + 3² + 5² + 7² + ... + (2·n-1)² = n*(4·n² - 1)/3. A447

Dodecahedral numbers: a(n) = n*(3·n - 1)*(3·n - 2)/2. A6566

Number of ways to choose three points in an (n X n)-grid (or geoplane). A178208

Binomial coefficients C(81,n). A17797

Triangle read by rows: T(n,k) = binomial(n·k,3) (0 <= k <= n). A334703

Smallest tetrahedral number m*(m+1)*(m+2)/6 that is divisible by n. A345989

Binomial coefficients C(n,78). A17742

a(n) = 3ⁿ*(3ⁿ-1)*(3ⁿ-2)/6. A26809

a(n) = binomial(n⁴, n). A107446

Sequence related to Hankel transform of super-ballot numbers. A156126