520040863 has 4 divisors (see below), whose sum is σ = 550631520. Its totient is φ = 489450208.

The previous prime is 520040861. The next prime is 520040881. The reversal of 520040863 is 368040025.

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 520040863 - 2¹ = 520040861 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 (520040861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15295303 + ... + 15295336.

It is an arithmetic number, because the mean of its divisors is an integer number (137657880).

Almost surely, 2^520040863 is an apocalyptic number.

520040863 is a deficient number, since it is larger than the sum of its proper divisors (30590657).

520040863 is a wasteful number, since it uses less digits than its factorization.

520040863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30590656.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 520040863 is about 22804.4044649274. The cubic root of 520040863 is about 804.1662151298.

Adding to 520040863 its reverse (368040025), we get a palindrome (888080888).

The spelling of 520040863 in words is "five hundred twenty million, forty thousand, eight hundred sixty-three".