520104131 has 4 divisors (see below), whose sum is σ = 520419672. Its totient is φ = 519788592.

The previous prime is 520104107. The next prime is 520104139. The reversal of 520104131 is 131401025.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 520104131 - 2¹⁰ = 520103107 is a prime.

It is a super-2 number, since 2×520104131² = 541016614166530322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (520104139) by changing a digit.

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, 155285 + ... + 158598.

It is an arithmetic number, because the mean of its divisors is an integer number (130104918).

Almost surely, 2^520104131 is an apocalyptic number.

520104131 is a deficient number, since it is larger than the sum of its proper divisors (315541).

520104131 is a wasteful number, since it uses less digits than its factorization.

520104131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315540.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 520104131 is about 22805.7916109045. The cubic root of 520104131 is about 804.1988253396.

Adding to 520104131 its reverse (131401025), we get a palindrome (651505156).

The spelling of 520104131 in words is "five hundred twenty million, one hundred four thousand, one hundred thirty-one".