520522313 has 4 divisors (see below), whose sum is σ = 520645248. Its totient is φ = 520399380.

The previous prime is 520522307. The next prime is 520522391. The reversal of 520522313 is 313225025.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 520522313 - 2¹⁶ = 520456777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (520522393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54881 + ... + 63662.

It is an arithmetic number, because the mean of its divisors is an integer number (130161312).

Almost surely, 2^520522313 is an apocalyptic number.

It is an amenable number.

520522313 is a deficient number, since it is larger than the sum of its proper divisors (122935).

520522313 is a wasteful number, since it uses less digits than its factorization.

520522313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122934.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 520522313 is about 22814.9580977042. The cubic root of 520522313 is about 804.4143023057.

Adding to 520522313 its reverse (313225025), we get a palindrome (833747338).

The spelling of 520522313 in words is "five hundred twenty million, five hundred twenty-two thousand, three hundred thirteen".