205031431434 has 16 divisors (see below), whose sum is σ = 410141950560. Its totient is φ = 68330629200.

The previous prime is 205031431393. The next prime is 205031431457. The reversal of 205031431434 is 434134130502.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3261592 + ... + 3323859.

It is an arithmetic number, because the mean of its divisors is an integer number (25633871910).

Almost surely, 2^205031431434 is an apocalyptic number.

205031431434 is an abundant number, since it is smaller than the sum of its proper divisors (205110519126).

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

205031431434 is a wasteful number, since it uses less digits than its factorization.

205031431434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6590645.

The product of its (nonzero) digits is 17280, while the sum is 30.

Adding to 205031431434 its reverse (434134130502), we get a palindrome (639165561936).

The spelling of 205031431434 in words is "two hundred five billion, thirty-one million, four hundred thirty-one thousand, four hundred thirty-four".