520522523 has 4 divisors (see below), whose sum is σ = 521034360. Its totient is φ = 520010688.

The previous prime is 520522501. The next prime is 520522529. The reversal of 520522523 is 325225025.

It is a happy number.

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-520522523 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 520522492 and 520522501.

It is not an unprimeable number, because it can be changed into a prime (520522529) 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, 254390 + ... + 256427.

It is an arithmetic number, because the mean of its divisors is an integer number (130258590).

Almost surely, 2^520522523 is an apocalyptic number.

520522523 is a deficient number, since it is larger than the sum of its proper divisors (511837).

520522523 is a wasteful number, since it uses less digits than its factorization.

520522523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511836.

The product of its (nonzero) digits is 6000, while the sum is 26.

The square root of 520522523 is about 22814.9626999476. The cubic root of 520522523 is about 804.4144104836.

Adding to 520522523 its reverse (325225025), we get a palindrome (845747548).

The spelling of 520522523 in words is "five hundred twenty million, five hundred twenty-two thousand, five hundred twenty-three".