520023532221 has 16 divisors (see below), whose sum is σ = 774276624000. Its totient is φ = 344940228864.

The previous prime is 520023532213. The next prime is 520023532241. The reversal of 520023532221 is 122235320025.

520023532221 is a `hidden beast` number, since 5 + 200 + 235 + 3 + 2 + 221 = 666.

It is not a de Polignac number, because 520023532221 - 2³ = 520023532213 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520023532241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48386916 + ... + 48397661.

It is an arithmetic number, because the mean of its divisors is an integer number (48392289000).

Almost surely, 2^520023532221 is an apocalyptic number.

It is an amenable number.

520023532221 is a deficient number, since it is larger than the sum of its proper divisors (254253091779).

520023532221 is a wasteful number, since it uses less digits than its factorization.

520023532221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96784785 (or 96784779 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

Adding to 520023532221 its reverse (122235320025), we get a palindrome (642258852246).

The spelling of 520023532221 in words is "five hundred twenty billion, twenty-three million, five hundred thirty-two thousand, two hundred twenty-one".