520534300221 has 12 divisors (see below), whose sum is σ = 809720022748. Its totient is φ = 320328800064.

The previous prime is 520534300213. The next prime is 520534300243. The reversal of 520534300221 is 122003435025.

It is a happy number.

520534300221 is a `hidden beast` number, since 5 + 2 + 0 + 5 + 3 + 430 + 0 + 221 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 71112888900 + 449421411321 = 266670^2 + 670389^2 .

It is not a de Polignac number, because 520534300221 - 2³ = 520534300213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520534320221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2224505440 + ... + 2224505673.

Almost surely, 2^520534300221 is an apocalyptic number.

It is an amenable number.

520534300221 is a deficient number, since it is larger than the sum of its proper divisors (289185722527).

520534300221 is a wasteful number, since it uses less digits than its factorization.

520534300221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4449011132 (or 4449011129 counting only the distinct ones).

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

Adding to 520534300221 its reverse (122003435025), we get a palindrome (642537735246).

The spelling of 520534300221 in words is "five hundred twenty billion, five hundred thirty-four million, three hundred thousand, two hundred twenty-one".