520521324401 has 16 divisors (see below), whose sum is σ = 590141811840. Its totient is φ = 455133219840.

The previous prime is 520521324391. The next prime is 520521324403. The reversal of 520521324401 is 104423125025.

It is a de Polignac number, because none of the positive numbers 2^k-520521324401 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 1810796 + ... + 2078466.

It is an arithmetic number, because the mean of its divisors is an integer number (36883863240).

Almost surely, 2^520521324401 is an apocalyptic number.

It is an amenable number.

520521324401 is a deficient number, since it is larger than the sum of its proper divisors (69620487439).

520521324401 is a wasteful number, since it uses less digits than its factorization.

520521324401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275576.

The product of its (nonzero) digits is 9600, while the sum is 29.

Adding to 520521324401 its reverse (104423125025), we get a palindrome (624944449426).

The spelling of 520521324401 in words is "five hundred twenty billion, five hundred twenty-one million, three hundred twenty-four thousand, four hundred one".