Properties of the Number 3215

Three Thousand Two Hundred Fifteen

Basics

Value: 3214 → 3215 → 3216

Parity: odd

Prime: No

Previous Prime: 3209

Next Prime: 3217

Digit Sum: 11

Digital Root: 2

Palindrome: No

Factorization: 5 × 643

Divisors: 1, 5, 643, 3215

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 110010001111

Octal: 6217

Duodecimal: 1A3B

Hexadecimal: c8f

Square: 10336225

Square Root: 56.70097000933934

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) = floor(4ⁿ/(2 + sqrt(2))ⁿ). A240572

Numbers n such that n¹²⁸+(n+1)¹²⁸ is a prime. A215431

Numbers that are the sum of six cubes in nine or more ways. A345518

Numbers that are the sum of six cubes in ten or more ways. A345519

Consecutive states of a linear congruential pseudo-random number generator (93·s+1) mod 2¹³ when started at s=1. A384126

Triangle read by rows: T(n,k) is the number of permutations of {1,2,...,n} whose longest block is of length k (0<=k<=n). A184182

Numbers that are the sum of six cubes in exactly ten ways. A345772

Composite de Polignac numbers (A006285). A98237

Numbers that are the product of two distinct primes a and b, such that a³+b³ is the average of a twin prime pair. A176876

Coefficients in the expansion of 1/([r] + [2r]x + [3r]x² + ...); [ ] = floor, r = 6/5. A279778