Properties of the Number 7218

Seven Thousand Two Hundred Eighteen

Basics

Value: 7217 → 7218 → 7219

Parity: even

Prime: No

Previous Prime: 7213

Next Prime: 7219

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 × 3 ² × 401

Divisors: 1, 2, 3, 6, 9, 18, 401, 802, 1203, 2406

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1110000110010

Octal: 16062

Duodecimal: 4216

Hexadecimal: 1c32

Square: 52099524

Square Root: 84.95881355103778

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

Multiples of 18 containing a 18 in their decimal representation. A121038

Number of compositions of n with at least one non-contiguous value. A335548

Number of orderless same-trees of weight n. A289078

Smallest positive number that can be written as sum of distinct Fibonacci numbers in n ways. A13583

T(n,k) = number of (n+2) X (k+2) binary matrices with every 3 X 3 block having exactly four 1's. A181262

Numbers that are the sum of five third powers in eight or more ways. A345183

Numbers that are the sum of five third powers in exactly eight ways. A345184

Triangle read by rows. Coefficients of the polynomials P(n, x) * EZ(n, x), where P denote the Pascal polynomials and EZ the zig-zag Eulerian polynomials A205497. A373432

Table of the elementary symmetric functions a_k(1,2,4,5,...,n+1). A196842

Number of partitions p of n such that the number of parts having multiplicity 1 is a part and max(p) - min(p) is not a part. A241449