205012510242 has 64 divisors (see below), whose sum is σ = 471735705600. Its totient is φ = 58966928640.

The previous prime is 205012510229. The next prime is 205012510267. The reversal of 205012510242 is 242015210502.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1646142 + ... + 1766297.

It is an arithmetic number, because the mean of its divisors is an integer number (7370870400).

Almost surely, 2^205012510242 is an apocalyptic number.

205012510242 is an abundant number, since it is smaller than the sum of its proper divisors (266723195358).

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

205012510242 is a wasteful number, since it uses less digits than its factorization.

205012510242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3412511.

The product of its (nonzero) digits is 1600, while the sum is 24.

Adding to 205012510242 its reverse (242015210502), we get a palindrome (447027720744).

The spelling of 205012510242 in words is "two hundred five billion, twelve million, five hundred ten thousand, two hundred forty-two".