204521253206 has 16 divisors (see below), whose sum is σ = 319775876016. Its totient is φ = 98011796256.

The previous prime is 204521253197. The next prime is 204521253247. The reversal of 204521253206 is 602352125402.

It is a Curzon number.

It is a congruent number.

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, 20620421 + ... + 20630336.

It is an arithmetic number, because the mean of its divisors is an integer number (19985992251).

Almost surely, 2^204521253206 is an apocalyptic number.

204521253206 is a deficient number, since it is larger than the sum of its proper divisors (115254622810).

204521253206 is a wasteful number, since it uses less digits than its factorization.

204521253206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41250863.

The product of its (nonzero) digits is 28800, while the sum is 32.

Adding to 204521253206 its reverse (602352125402), we get a palindrome (806873378608).

The spelling of 204521253206 in words is "two hundred four billion, five hundred twenty-one million, two hundred fifty-three thousand, two hundred six".