215 (two hundred [and] fifteen) is the natural number following 214 and preceding 216.
In mathematics 215 is a semiprime.
215 = ( 3 ! ) 3 − 1 {\displaystyle 215=(3!)^{3}-1} . 215 is the coefficient of the quadratic term in the Maclaurin series for x ∗ ( 5 + 215 ∗ x − 1253 ∗ x 2 − 23 ∗ x 3 ) / ( ( 1 + 34 ∗ x + x 2 ) ∗ ( 1 − 34 ∗ x + x 2 ) ) {\displaystyle x*(5+215*x-1253*x^{2}-23*x^{3})/((1+34*x+x^{2})*(1-34*x+x^{2}))} . 215 is a vertically symmetric number on a calculator display (sequence A053701 in the OEIS).
In other fields California Proposition 215 legalized Marijuana for medical use for the first time in the United States.
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