243204012 has 48 divisors (see below), whose sum is σ = 636679680. Its totient is φ = 80277264.

The previous prime is 243203999. The next prime is 243204043. The reversal of 243204012 is 210402342.

243204012 is a `hidden beast` number, since 243 + 20 + 401 + 2 = 666.

243204012 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×243204012² = 118296382905792288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 193 + ... + 22055.

It is an arithmetic number, because the mean of its divisors is an integer number (13264160).

Almost surely, 2^243204012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243204012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (318339840).

243204012 is an abundant number, since it is smaller than the sum of its proper divisors (393475668).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

243204012 is a wasteful number, since it uses less digits than its factorization.

243204012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21979 (or 21971 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 243204012 is about 15594.9995831997. Note that the first 3 decimals coincide. The cubic root of 243204012 is about 624.1997326595.

Adding to 243204012 its reverse (210402342), we get a palindrome (453606354).

The spelling of 243204012 in words is "two hundred forty-three million, two hundred four thousand, twelve".