204243245111 has 4 divisors (see below), whose sum is σ = 204318034824. Its totient is φ = 204168455400.

The previous prime is 204243245039. The next prime is 204243245119. The reversal of 204243245111 is 111542342402.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204243245111 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 (204243245119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37390760 + ... + 37396221.

It is an arithmetic number, because the mean of its divisors is an integer number (51079508706).

Almost surely, 2^204243245111 is an apocalyptic number.

204243245111 is a deficient number, since it is larger than the sum of its proper divisors (74789713).

204243245111 is an equidigital number, since it uses as much as digits as its factorization.

204243245111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74789712.

The product of its (nonzero) digits is 7680, while the sum is 29.

Adding to 204243245111 its reverse (111542342402), we get a palindrome (315785587513).

The spelling of 204243245111 in words is "two hundred four billion, two hundred forty-three million, two hundred forty-five thousand, one hundred eleven".