Properties of the Number 18216

Eighteen Thousand Two Hundred Sixteen

Basics

Value: 18215 → 18216 → 18217

Parity: even

Prime: No

Previous Prime: 18211

Next Prime: 18217

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 ³ × 3 ² × 11 × 23

Divisors: 1, 2, 3, 4, 6, 8, 9, 11, 12, 18

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 100011100101000

Octal: 43450

Duodecimal: A660

Hexadecimal: 4728

Square: 331822656

Square Root: 134.9666625504239

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

Number of integer partitions of n that can be partitioned into a set of sets. A382077

E.g.f.: sin(x)/(1+LambertW(-x)). A277461

a(n) = n³ + (n+1)³ + (n+2)³ + (n+3)³. A27603

Number of 5-way intersections in the interior of a regular 6n-gon. A137939

T(n,k)=Number of nXk arrays of occupancy after each element moves to some horizontal or vertical neighbor, without 2-loops or left turns. A221768

Number of binary words w of length n with equal numbers of 010 and 101 subwords such that for every prefix of w the number of occurrences of subword 101 is larger than or equal to the number of occurrences of subword 010. A260697

Numbers k such that k+1 is a prime, k+2 is twice a prime, and k+3 is three times a prime. A278583

Numbers k at which point A336459(k) appears multiplicative, but A051027(k) does not. A336561

Main diagonal of symmetric square table A084867, in which the antidiagonal sums (A006012) form the first row shifted left. A84868

a(n) = 81·n² - 9. A157909