520423163 has 8 divisors (see below), whose sum is σ = 563774400. Its totient is φ = 480388584.

The previous prime is 520423157. The next prime is 520423171. The reversal of 520423163 is 361324025.

It is not a de Polignac number, because 520423163 - 2⁸ = 520422907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (520423063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116243 + ... + 120636.

It is an arithmetic number, because the mean of its divisors is an integer number (70471800).

Almost surely, 2^520423163 is an apocalyptic number.

520423163 is a deficient number, since it is larger than the sum of its proper divisors (43351237).

520423163 is an equidigital number, since it uses as much as digits as its factorization.

520423163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236918 (or 236892 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 520423163 is about 22812.7850776708. The cubic root of 520423163 is about 804.3632236483.

Adding to 520423163 its reverse (361324025), we get a palindrome (881747188).

The spelling of 520423163 in words is "five hundred twenty million, four hundred twenty-three thousand, one hundred sixty-three".