520524311 has 6 divisors (see below), whose sum is σ = 522211536. Its totient is φ = 518842500.

The previous prime is 520524307. The next prime is 520524337. The reversal of 520524311 is 113425025.

It is not a de Polignac number, because 520524311 - 2² = 520524307 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 (520524341) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 107186 + ... + 111936.

It is an arithmetic number, because the mean of its divisors is an integer number (87035256).

Almost surely, 2^520524311 is an apocalyptic number.

520524311 is a deficient number, since it is larger than the sum of its proper divisors (1687225).

520524311 is an frugal number, since it uses more digits than its factorization.

520524311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5413 (or 5082 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 520524311 is about 22815.0018847249. The cubic root of 520524311 is about 804.4153315397.

Adding to 520524311 its reverse (113425025), we get a palindrome (633949336).

The spelling of 520524311 in words is "five hundred twenty million, five hundred twenty-four thousand, three hundred eleven".