521404204 has 12 divisors (see below), whose sum is σ = 952129584. Its totient is φ = 249367184.

The previous prime is 521404183. The next prime is 521404207. The reversal of 521404204 is 402404125.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (521404207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2833627 + ... + 2833810.

It is an arithmetic number, because the mean of its divisors is an integer number (79344132).

Almost surely, 2^521404204 is an apocalyptic number.

It is an amenable number.

521404204 is a deficient number, since it is larger than the sum of its proper divisors (430725380).

521404204 is a wasteful number, since it uses less digits than its factorization.

521404204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5667464 (or 5667462 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 521404204 is about 22834.2769537378. The cubic root of 521404204 is about 804.8683369406.

Adding to 521404204 its reverse (402404125), we get a palindrome (923808329).

The spelling of 521404204 in words is "five hundred twenty-one million, four hundred four thousand, two hundred four".