520042313 has 8 divisors (see below), whose sum is σ = 594475200. Its totient is φ = 445644720.

The previous prime is 520042309. The next prime is 520042349. The reversal of 520042313 is 313240025.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 520042313 - 2² = 520042309 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (520042513) 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, 43298 + ... + 53988.

It is an arithmetic number, because the mean of its divisors is an integer number (74309400).

Almost surely, 2^520042313 is an apocalyptic number.

It is an amenable number.

520042313 is a deficient number, since it is larger than the sum of its proper divisors (74432887).

520042313 is a wasteful number, since it uses less digits than its factorization.

520042313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17647.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 520042313 is about 22804.4362570093. The cubic root of 520042313 is about 804.1669625325.

Adding to 520042313 its reverse (313240025), we get a palindrome (833282338).

The spelling of 520042313 in words is "five hundred twenty million, forty-two thousand, three hundred thirteen".