520304313 has 8 divisors (see below), whose sum is σ = 697995808. Its totient is φ = 344741184.

The previous prime is 520304311. The next prime is 520304333. The reversal of 520304313 is 313403025.

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

It is not a de Polignac number, because 520304313 - 2¹ = 520304311 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 520304313.

It is not an unprimeable number, because it can be changed into a prime (520304311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 531520 + ... + 532497.

It is an arithmetic number, because the mean of its divisors is an integer number (87249476).

Almost surely, 2^520304313 is an apocalyptic number.

It is an amenable number.

520304313 is a deficient number, since it is larger than the sum of its proper divisors (177691495).

520304313 is a wasteful number, since it uses less digits than its factorization.

520304313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1064183.

The product of its (nonzero) digits is 1080, while the sum is 21.

The square root of 520304313 is about 22810.1800299778. The cubic root of 520304313 is about 804.3019876810.

Adding to 520304313 its reverse (313403025), we get a palindrome (833707338).

The spelling of 520304313 in words is "five hundred twenty million, three hundred four thousand, three hundred thirteen".