30 is, like all natural numbers1Proof: Allow that 1 is interesting. Let n>1 be the smallest non-interesting natural number. This fact makes it interesting; thus, no uninteresting number can exist., interesting. Let’s look at a few facts about it.

• It’s a square pyramidal number (see featured image)
• It’s the first sphenic number (a number with three distinct prime factors)
• It’s a primorial number, the result of an operation similar to the factorial but multiplying together only primes
• It’s a Harshad number, meaning it is divisible by the sum of its digits (30/(3+0) = 10)
• It’s the number of edges of both a dodecahedron and an icosahedron
• It’s the largest and smallest power to receive an SI prefix, with 10^30 being a Quetta-unit and 10^-30 being a Quecto-unit
• It’s used in typographical notation to indicate the end of a story, in the form -30-
• It’s the number of days used to approximate a month
• It’s the international calling code for Greece
• It’s the atomic number of Zinc
• It’s the year, BC, that Cleopatra died
• It’s the number of silver pieces for which Judas betrayed Jesus
• It’s represented in Roman numerals by XXX, one of the funnier possible Roman numeral values
• It’s the original number of upright stones in Stonehenge
• It’s the number of teeth cats have
• It’s the age I turned today