185 (number)

Basic Properties

185 is an odd number. Its prime factorization is 5 * 37 meaning that 185 is a composite number.

Complex properties

There are 185 different directed graphs on four unlabeled vertices that have at least one sink vertex, with no pointing edges, 185 ways of changing the order of the squares of a ${\displaystyle 2\times 4}$ grid of squares in a way that each square is one unit away from its original position horizontally, vertically, or diagonally, and 185 matroids on five labeled elements in which each element takes part in at least one basis.

185 is the smallest base b without algebraic factorisation of generalized repunits for no generalized repunit primes are known. It is known that the generalized repunit number ${\displaystyle {\frac {185^{p}-1}{184}}}$ is composite for all prime p < 350,000.

The Spiral of Theodorus is formed by unit-length line pieces that, together with the center point of the spiral, form right triangles. 185 of these right triangles fit within the first four turns of this spiral.