Properties of the Number 7228

Seven Thousand Two Hundred Twenty-Eight

Basics

Value: 7227 → 7228 → 7229

Parity: even

Prime: No

Previous Prime: 7219

Next Prime: 7229

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 2 ² × 13 × 139

Divisors: 1, 2, 4, 13, 26, 52, 139, 278, 556, 1807

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1110000111100

Octal: 16074

Duodecimal: 4224

Hexadecimal: 1c3c

Square: 52243984

Square Root: 85.01764522732913

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 T(n,k) of partitions of the k-dimensional hypercube resulting from a sequence of n bisections, each of which splits any part perpendicular to any of the axes, such that each axis is used at least once; triangle T(n,k), n>=0, 0<=k<=n, read by rows. A255982

Integers that need 7 iterations of the map x->A352172(x) to reach 1. A352265

T(n,k)=Number of (n+1)X(k+1) 0..1 arrays x(i,j) with row sums sum{j²*x(i,j), j=1..k+1} nondecreasing, and column sums sum{i²*x(i,j), i=1..n+1} nondecreasing. A232877

Number of tilings of a 4 X n rectangle using T and Z tetrominoes. A233139

Coefficient of xⁿ in the expansion of ( (1+x) * (1+x+x²)² )ⁿ. A370159

a(n) = 4*(n² - n + 1). A112087

a(n) = 2*(n³ + n² + n - 1). A155120

Number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 405", based on the 5-celled von Neumann neighborhood. A271812

Number of integer partitions of n with biquanimous multiplicities. A371839

a(n) = round(e^π*sqrt(n)). A56580