520505524 has 48 divisors (see below), whose sum is σ = 1202463360. Its totient is φ = 190863360.

The previous prime is 520505443. The next prime is 520505539. The reversal of 520505524 is 425505025.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 520505492 and 520505501.

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 15 ways as a sum of consecutive naturals, for example, 44469 + ... + 54940.

It is an arithmetic number, because the mean of its divisors is an integer number (25051320).

Almost surely, 2^520505524 is an apocalyptic number.

It is an amenable number.

520505524 is an abundant number, since it is smaller than the sum of its proper divisors (681957836).

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

520505524 is a wasteful number, since it uses less digits than its factorization.

520505524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99448 (or 99446 counting only the distinct ones).

The product of its (nonzero) digits is 10000, while the sum is 28.

The square root of 520505524 is about 22814.5901563013. The cubic root of 520505524 is about 804.4056536487.

The spelling of 520505524 in words is "five hundred twenty million, five hundred five thousand, five hundred twenty-four".