520530512 has 20 divisors (see below), whose sum is σ = 1043305620. Its totient is φ = 251290368.

The previous prime is 520530487. The next prime is 520530529. The reversal of 520530512 is 215035025.

It can be written as a sum of positive squares in 2 ways, for example, as 402243136 + 118287376 = 20056^2 + 10876^2 .

It is a congruent number.

It is an unprimeable number.

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, 560453 + ... + 561380.

It is an arithmetic number, because the mean of its divisors is an integer number (52165281).

Almost surely, 2^520530512 is an apocalyptic number.

It is an amenable number.

520530512 is an abundant number, since it is smaller than the sum of its proper divisors (522775108).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

520530512 is a wasteful number, since it uses less digits than its factorization.

520530512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1121870 (or 1121864 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 520530512 is about 22815.1377817448. The cubic root of 520530512 is about 804.4185258571.

Adding to 520530512 its reverse (215035025), we get a palindrome (735565537).

The spelling of 520530512 in words is "five hundred twenty million, five hundred thirty thousand, five hundred twelve".