520311263 has 4 divisors (see below), whose sum is σ = 520422288. Its totient is φ = 520200240.

The previous prime is 520311241. The next prime is 520311271. The reversal of 520311263 is 362113025.

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 520311263 - 2⁶ = 520311199 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 (520311283) 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 in 3 ways as a sum of consecutive naturals, for example, 48158 + ... + 57963.

It is an arithmetic number, because the mean of its divisors is an integer number (130105572).

Almost surely, 2^520311263 is an apocalyptic number.

520311263 is a deficient number, since it is larger than the sum of its proper divisors (111025).

520311263 is a wasteful number, since it uses less digits than its factorization.

520311263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111024.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 520311263 is about 22810.3323737292. The cubic root of 520311263 is about 804.3055688377.

Adding to 520311263 its reverse (362113025), we get a palindrome (882424288).

The spelling of 520311263 in words is "five hundred twenty million, three hundred eleven thousand, two hundred sixty-three".