204243215111 has 8 divisors (see below), whose sum is σ = 220940576640. Its totient is φ = 187686760032.

The previous prime is 204243215063. The next prime is 204243215129. The reversal of 204243215111 is 111512342402.

It is a happy number.

204243215111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204243215111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204243215191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35223596 + ... + 35229393.

It is an arithmetic number, because the mean of its divisors is an integer number (27617572080).

Almost surely, 2^204243215111 is an apocalyptic number.

204243215111 is a deficient number, since it is larger than the sum of its proper divisors (16697361529).

204243215111 is a wasteful number, since it uses less digits than its factorization.

204243215111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70453225.

The product of its (nonzero) digits is 1920, while the sum is 26.

Adding to 204243215111 its reverse (111512342402), we get a palindrome (315755557513).

The spelling of 204243215111 in words is "two hundred four billion, two hundred forty-three million, two hundred fifteen thousand, one hundred eleven".