520505271 has 56 divisors (see below), whose sum is σ = 917018256. Its totient is φ = 291133440.

The previous prime is 520505173. The next prime is 520505287. The reversal of 520505271 is 172505025.

It is a happy number.

It is not a de Polignac number, because 520505271 - 2¹⁰ = 520504247 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520505771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 101751 + ... + 106743.

It is an arithmetic number, because the mean of its divisors is an integer number (16375326).

Almost surely, 2^520505271 is an apocalyptic number.

520505271 is a deficient number, since it is larger than the sum of its proper divisors (396512985).

520505271 is a wasteful number, since it uses less digits than its factorization.

520505271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5035 (or 5020 counting only the distinct ones).

The product of its (nonzero) digits is 3500, while the sum is 27.

The square root of 520505271 is about 22814.5846116032. The cubic root of 520505271 is about 804.4055233173.

The spelling of 520505271 in words is "five hundred twenty million, five hundred five thousand, two hundred seventy-one".