520031305 has 4 divisors (see below), whose sum is σ = 624037572. Its totient is φ = 416025040.

The previous prime is 520031297. The next prime is 520031327. The reversal of 520031305 is 503130025.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 90174016 + 429857289 = 9496^2 + 20733^2 .

It is not a de Polignac number, because 520031305 - 2³ = 520031297 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52003126 + ... + 52003135.

It is an arithmetic number, because the mean of its divisors is an integer number (156009393).

Almost surely, 2^520031305 is an apocalyptic number.

It is an amenable number.

520031305 is a deficient number, since it is larger than the sum of its proper divisors (104006267).

520031305 is a wasteful number, since it uses less digits than its factorization.

520031305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104006266.

The product of its (nonzero) digits is 450, while the sum is 19.

The square root of 520031305 is about 22804.1948991847. The cubic root of 520031305 is about 804.1612884222.

The spelling of 520031305 in words is "five hundred twenty million, thirty-one thousand, three hundred five".