520105111 has 16 divisors (see below), whose sum is σ = 547200000. Its totient is φ = 493680096.

The previous prime is 520105099. The next prime is 520105151. The reversal of 520105111 is 111501025.

It is a cyclic number.

It is not a de Polignac number, because 520105111 - 2⁷ = 520104983 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 (520105151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 867990 + ... + 868588.

It is an arithmetic number, because the mean of its divisors is an integer number (34200000).

Almost surely, 2^520105111 is an apocalyptic number.

520105111 is a deficient number, since it is larger than the sum of its proper divisors (27094889).

520105111 is a wasteful number, since it uses less digits than its factorization.

520105111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1086.

The product of its (nonzero) digits is 50, while the sum is 16.

The square root of 520105111 is about 22805.8130966646. The cubic root of 520105111 is about 804.1993304399.

Adding to 520105111 its reverse (111501025), we get a palindrome (631606136).

It can be divided in two parts, 52010 and 5111, that added together give a square (57121 = 239²).

The spelling of 520105111 in words is "five hundred twenty million, one hundred five thousand, one hundred eleven".