52505108021 has 2 divisors, whose sum is σ = 52505108022. Its totient is φ = 52505108020.

The previous prime is 52505107987. The next prime is 52505108057. The reversal of 52505108021 is 12080150525.

52505108021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37428706225 + 15076401796 = 193465^2 + 122786^2 .

It is a cyclic number.

It is not a de Polignac number, because 52505108021 - 2⁶ = 52505107957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52505108221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26252554010 + 26252554011.

It is an arithmetic number, because the mean of its divisors is an integer number (26252554011).

Almost surely, 2^52505108021 is an apocalyptic number.

It is an amenable number.

52505108021 is a deficient number, since it is larger than the sum of its proper divisors (1).

52505108021 is an equidigital number, since it uses as much as digits as its factorization.

52505108021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4000, while the sum is 29.

Adding to 52505108021 its reverse (12080150525), we get a palindrome (64585258546).

The spelling of 52505108021 in words is "fifty-two billion, five hundred five million, one hundred eight thousand, twenty-one".