520566071 has 4 divisors (see below), whose sum is σ = 522900672. Its totient is φ = 518231472.

The previous prime is 520566029. The next prime is 520566089. The reversal of 520566071 is 170665025.

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-520566071 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 (520562071) 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 3 ways as a sum of consecutive naturals, for example, 1166966 + ... + 1167411.

It is an arithmetic number, because the mean of its divisors is an integer number (130725168).

Almost surely, 2^520566071 is an apocalyptic number.

520566071 is a deficient number, since it is larger than the sum of its proper divisors (2334601).

520566071 is a wasteful number, since it uses less digits than its factorization.

520566071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2334600.

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 520566071 is about 22815.9170536711. The cubic root of 520566071 is about 804.4368428538.

The spelling of 520566071 in words is "five hundred twenty million, five hundred sixty-six thousand, seventy-one".