520521324402 has 8 divisors (see below), whose sum is σ = 1041042648816. Its totient is φ = 173507108132.

The previous prime is 520521324391. The next prime is 520521324403. The reversal of 520521324402 is 204423125025.

It is a sphenic number, since it is the product of 3 distinct primes.

520521324402 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 520521324402.

It is not an unprimeable number, because it can be changed into a prime (520521324403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43376777028 + ... + 43376777039.

It is an arithmetic number, because the mean of its divisors is an integer number (130130331102).

Almost surely, 2^520521324402 is an apocalyptic number.

520521324402 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

520521324402 is a wasteful number, since it uses less digits than its factorization.

520521324402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86753554072.

The product of its (nonzero) digits is 19200, while the sum is 30.

Adding to 520521324402 its reverse (204423125025), we get a palindrome (724944449427).

The spelling of 520521324402 in words is "five hundred twenty billion, five hundred twenty-one million, three hundred twenty-four thousand, four hundred two".