205254427290 has 64 divisors (see below), whose sum is σ = 542610911232. Its totient is φ = 49275547200.

The previous prime is 205254427289. The next prime is 205254427307. The reversal of 205254427290 is 92724452502.

205254427290 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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, 2985346 + ... + 3053325.

It is an arithmetic number, because the mean of its divisors is an integer number (8478295488).

Almost surely, 2^205254427290 is an apocalyptic number.

205254427290 is an abundant number, since it is smaller than the sum of its proper divisors (337356483942).

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

205254427290 is a wasteful number, since it uses less digits than its factorization.

205254427290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6038795.

The product of its (nonzero) digits is 403200, while the sum is 42.

Adding to 205254427290 its reverse (92724452502), we get a palindrome (297978879792).

The spelling of 205254427290 in words is "two hundred five billion, two hundred fifty-four million, four hundred twenty-seven thousand, two hundred ninety".