50505005521 has 2 divisors, whose sum is σ = 50505005522. Its totient is φ = 50505005520.

The previous prime is 50505005519. The next prime is 50505005527. The reversal of 50505005521 is 12550050505.

It is a happy number.

50505005521 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., 26231365521 + 24273640000 = 161961^2 + 155800^2 .

It is a cyclic number.

It is not a de Polignac number, because 50505005521 - 2¹ = 50505005519 is a prime.

Together with 50505005519, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 50505005521.

It is not a weakly prime, because it can be changed into another prime (50505005527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25252502760 + 25252502761.

It is an arithmetic number, because the mean of its divisors is an integer number (25252502761).

Almost surely, 2^50505005521 is an apocalyptic number.

It is an amenable number.

50505005521 is a deficient number, since it is larger than the sum of its proper divisors (1).

50505005521 is an equidigital number, since it uses as much as digits as its factorization.

50505005521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6250, while the sum is 28.

The spelling of 50505005521 in words is "fifty billion, five hundred five million, five thousand, five hundred twenty-one".