243220204242 has 48 divisors (see below), whose sum is σ = 532528570392. Its totient is φ = 80219704320.

The previous prime is 243220204207. The next prime is 243220204259. The reversal of 243220204242 is 242402022342.

243220204242 is a `hidden beast` number, since 2 + 4 + 32 + 202 + 0 + 424 + 2 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 174507543081 + 68712661161 = 417741^2 + 262131^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9480192 + ... + 9505812.

Almost surely, 2^243220204242 is an apocalyptic number.

243220204242 is an abundant number, since it is smaller than the sum of its proper divisors (289308366150).

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

243220204242 is a wasteful number, since it uses less digits than its factorization.

243220204242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31163 (or 31160 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 27.

Adding to 243220204242 its reverse (242402022342), we get a palindrome (485622226584).

The spelling of 243220204242 in words is "two hundred forty-three billion, two hundred twenty million, two hundred four thousand, two hundred forty-two".