520828111 has 2 divisors, whose sum is σ = 520828112. Its totient is φ = 520828110.

The previous prime is 520828109. The next prime is 520828127. The reversal of 520828111 is 111828025.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 520828111 - 2¹ = 520828109 is a prime.

Together with 520828109, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 520828111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (520828141) 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 as a sum of consecutive naturals, namely, 260414055 + 260414056.

It is an arithmetic number, because the mean of its divisors is an integer number (260414056).

Almost surely, 2^520828111 is an apocalyptic number.

520828111 is a deficient number, since it is larger than the sum of its proper divisors (1).

520828111 is an equidigital number, since it uses as much as digits as its factorization.

520828111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1280, while the sum is 28.

The square root of 520828111 is about 22821.6588135043. The cubic root of 520828111 is about 804.5717980384.

The spelling of 520828111 in words is "five hundred twenty million, eight hundred twenty-eight thousand, one hundred eleven".