520111444 has 12 divisors (see below), whose sum is σ = 910371924. Its totient is φ = 260005184.

The previous prime is 520111439. The next prime is 520111477. The reversal of 520111444 is 444111025.

It can be written as a sum of positive squares in 2 ways, for example, as 282643344 + 237468100 = 16812^2 + 15410^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19734 + ... + 37810.

It is an arithmetic number, because the mean of its divisors is an integer number (75864327).

Almost surely, 2^520111444 is an apocalyptic number.

It is an amenable number.

520111444 is a deficient number, since it is larger than the sum of its proper divisors (390260480).

520111444 is a wasteful number, since it uses less digits than its factorization.

520111444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25274 (or 25272 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 520111444 is about 22805.9519424206. The cubic root of 520111444 is about 804.2025945069.

Adding to 520111444 its reverse (444111025), we get a palindrome (964222469).

The spelling of 520111444 in words is "five hundred twenty million, one hundred eleven thousand, four hundred forty-four".