520523957247 has 48 divisors (see below), whose sum is σ = 828704397024. Its totient is φ = 289668960000.

The previous prime is 520523957209. The next prime is 520523957297. The reversal of 520523957247 is 742759325025.

It is a happy number.

It is not a de Polignac number, because 520523957247 - 2¹⁰ = 520523956223 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 520523957247.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520523957207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 618297 + ... + 1193037.

It is an arithmetic number, because the mean of its divisors is an integer number (17264674938).

Almost surely, 2^520523957247 is an apocalyptic number.

520523957247 is a deficient number, since it is larger than the sum of its proper divisors (308180439777).

520523957247 is a wasteful number, since it uses less digits than its factorization.

520523957247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 574920 (or 574913 counting only the distinct ones).

The product of its (nonzero) digits is 5292000, while the sum is 51.

The spelling of 520523957247 in words is "five hundred twenty billion, five hundred twenty-three million, nine hundred fifty-seven thousand, two hundred forty-seven".