520444813 has 16 divisors (see below), whose sum is σ = 604834560. Its totient is φ = 438604416.

The previous prime is 520444753. The next prime is 520444829. The reversal of 520444813 is 318444025.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-520444813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520444013) 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, 182031 + ... + 184867.

It is an arithmetic number, because the mean of its divisors is an integer number (37802160).

Almost surely, 2^520444813 is an apocalyptic number.

It is an amenable number.

520444813 is a deficient number, since it is larger than the sum of its proper divisors (84389747).

520444813 is a wasteful number, since it uses less digits than its factorization.

520444813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3276.

The product of its (nonzero) digits is 15360, while the sum is 31.

The square root of 520444813 is about 22813.2595873540. The cubic root of 520444813 is about 804.3743775346.

Adding to 520444813 its reverse (318444025), we get a palindrome (838888838).

The spelling of 520444813 in words is "five hundred twenty million, four hundred forty-four thousand, eight hundred thirteen".