215 (number)

• 215 is a composite number and a semiprime ($=5\backslash times43$).
• $215\; =\; (3!)^3\; -\; 1$.
• 215 is the second smallest integer (after 5) such that $n^2-17$ is twice a square: $215^2-17\; =\; 2\; \backslash times\; 152^2$.{{OEIS|A144796}}
• 215 is a vertically symmetric number on a calculator display {{OEIS|id=A053701}}.

• 215 is often used as slang for marijuana, from California Proposition 215, legalizing it for medical use.{{Fact|date=January 2025}}

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Category:Integers

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ca:Nombre 210#Nombres del 211 al 219