520423321530 has 64 divisors (see below), whose sum is σ = 1437027091200. Its totient is φ = 118155546624.

The previous prime is 520423321433. The next prime is 520423321559. The reversal of 520423321530 is 35123324025.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8284839 + ... + 8347418.

It is an arithmetic number, because the mean of its divisors is an integer number (22453548300).

Almost surely, 2^520423321530 is an apocalyptic number.

520423321530 is an abundant number, since it is smaller than the sum of its proper divisors (916603769670).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

520423321530 is a wasteful number, since it uses less digits than its factorization.

520423321530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16632423.

The product of its (nonzero) digits is 21600, while the sum is 30.

Adding to 520423321530 its reverse (35123324025), we get a palindrome (555546645555).

The spelling of 520423321530 in words is "five hundred twenty billion, four hundred twenty-three million, three hundred twenty-one thousand, five hundred thirty".