520509057 has 8 divisors (see below), whose sum is σ = 694118976. Its totient is φ = 346952592.

The previous prime is 520509029. The next prime is 520509071. The reversal of 520509057 is 750905025.

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

It is a de Polignac number, because none of the positive numbers 2^k-520509057 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (520501057) 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 7 ways as a sum of consecutive naturals, for example, 25548 + ... + 41154.

It is an arithmetic number, because the mean of its divisors is an integer number (86764872).

Almost surely, 2^520509057 is an apocalyptic number.

It is an amenable number.

520509057 is a deficient number, since it is larger than the sum of its proper divisors (173609919).

520509057 is a wasteful number, since it uses less digits than its factorization.

520509057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26727.

The product of its (nonzero) digits is 15750, while the sum is 33.

The square root of 520509057 is about 22814.6675846921. The cubic root of 520509057 is about 804.4074736478.

The spelling of 520509057 in words is "five hundred twenty million, five hundred nine thousand, fifty-seven".