Properties of the Number 75220

Seventy-Five Thousand Two Hundred Twenty

Basics

Value: 75219 → 75220 → 75221

Parity: even

Prime: No

Previous Prime: 75217

Next Prime: 75223

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 2 ² × 5 × 3761

Divisors: 1, 2, 4, 5, 10, 20, 3761, 7522, 15044, 18805

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10010010111010100

Octal: 222724

Duodecimal: 37644

Hexadecimal: 125d4

Square: 5658048400

Square Root: 274.2626478396211

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) is the surface area of the symmetric tower described in A221529 which is a polycube whose successive terraces are the symmetric representation of σ A000203(i) (from i = 1 to n) starting from the top and the levels of these terraces are the partition numbers A000041(h-1) (from h = 1 to n) starting from the base. A345023

Numerator of ∑_i=1..n i³/(n-i+1). A119783

Square array, read by antidiagonals, where row n equals the crystal ball sequence for the 2·n-dimensional lattice A_n x A_n. A143007

Number of polyiamonds with n cells that tile the plane by 180-degree rotation (Conway criterion). A75220