204231815485 has 16 divisors (see below), whose sum is σ = 259542055872. Its totient is φ = 153746387200.

The previous prime is 204231815471. The next prime is 204231815497. The reversal of 204231815485 is 584518132402.

It is not a de Polignac number, because 204231815485 - 2²³ = 204223426877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 252930 + ... + 687340.

It is an arithmetic number, because the mean of its divisors is an integer number (16221378492).

Almost surely, 2^204231815485 is an apocalyptic number.

It is an amenable number.

204231815485 is a deficient number, since it is larger than the sum of its proper divisors (55310240387).

204231815485 is a wasteful number, since it uses less digits than its factorization.

204231815485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439964.

The product of its (nonzero) digits is 307200, while the sum is 43.

Adding to 204231815485 its reverse (584518132402), we get a palindrome (788749947887).

The spelling of 204231815485 in words is "two hundred four billion, two hundred thirty-one million, eight hundred fifteen thousand, four hundred eighty-five".