Adding to 212304 its reverse (403212), we get a palindrome (615516).
212304 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a self number, because there is not a number n which added to its sum of digits gives 212304.
It is a congruent number.
It is an unprimeable number.
212304 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
2212304 is an apocalyptic number.
212304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.
It is an amenable number.
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
212304 is a wasteful number, since it uses less digits than its factorization.
212304 is an odious number, because the sum of its binary digits is odd.
The square root of 212304 is about 460.7645819722. The cubic root of 212304 is about 59.6558070738.
The spelling of 212304 in words is "two hundred twelve thousand, three hundred four", and thus it is an iban number.