215 (two hundred ndfifteen) is the

natural number In mathematics, the natural numbers are the numbers 0, 1, 2, 3, and so on, possibly excluding 0. Some start counting with 0, defining the natural numbers as the non-negative integers , while others start with 1, defining them as the positive in ...

following 214 and preceding 216.

In mathematics

*215 is a

composite number A composite number is a positive integer that can be formed by multiplying two smaller positive integers. Accordingly it is a positive integer that has at least one divisor other than 1 and itself. Every positive integer is composite, prime numb ...

and a semiprime (

=5\times43

). *

215 = (3!)^3 - 1

. *215 is the second smallest integer (after 5) such that

n^2-17

is twice a square:

215^2-17 = 2 \times 152^2

. *215 is a vertically symmetric number on a calculator display .

In other fields

*215 is often used as slang for

marijuana Cannabis (), commonly known as marijuana (), weed, pot, and ganja, List of slang names for cannabis, among other names, is a non-chemically uniform psychoactive drug from the ''Cannabis'' plant. Native to Central or South Asia, cannabis has ...

, from California Proposition 215, legalizing it for medical use.

References

Integers {{Num-stub ca:Nombre 210#Nombres del 211 al 219