520530513 has 8 divisors (see below), whose sum is σ = 694229376. Its totient is φ = 346926000.

The previous prime is 520530487. The next prime is 520530529. The reversal of 520530513 is 315035025.

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

It is not a de Polignac number, because 520530513 - 2⁶ = 520530449 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (520530533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9513 + ... + 33638.

It is an arithmetic number, because the mean of its divisors is an integer number (86778672).

Almost surely, 2^520530513 is an apocalyptic number.

It is an amenable number.

520530513 is a deficient number, since it is larger than the sum of its proper divisors (173698863).

520530513 is a wasteful number, since it uses less digits than its factorization.

520530513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47175.

The product of its (nonzero) digits is 2250, while the sum is 24.

The square root of 520530513 is about 22815.1378036601. The cubic root of 520530513 is about 804.4185263723.

Adding to 520530513 its reverse (315035025), we get a palindrome (835565538).

The spelling of 520530513 in words is "five hundred twenty million, five hundred thirty thousand, five hundred thirteen".