520352525503 has 4 divisors (see below), whose sum is σ = 525504530808. Its totient is φ = 515200520200.

The previous prime is 520352525461. The next prime is 520352525569. The reversal of 520352525503 is 305525253025.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-520352525503 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 (520352525603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2576002501 + ... + 2576002702.

It is an arithmetic number, because the mean of its divisors is an integer number (131376132702).

Almost surely, 2^520352525503 is an apocalyptic number.

520352525503 is a deficient number, since it is larger than the sum of its proper divisors (5152005305).

520352525503 is a wasteful number, since it uses less digits than its factorization.

520352525503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5152005304.

The product of its (nonzero) digits is 225000, while the sum is 37.

Adding to 520352525503 its reverse (305525253025), we get a palindrome (825877778528).

The spelling of 520352525503 in words is "five hundred twenty billion, three hundred fifty-two million, five hundred twenty-five thousand, five hundred three".