500056000021 has 2 divisors, whose sum is σ = 500056000022. Its totient is φ = 500056000020.

The previous prime is 500055999983. The next prime is 500056000033. The reversal of 500056000021 is 120000650005.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 499439024100 + 616975921 = 706710^2 + 24839^2 .

It is a cyclic number.

It is not a de Polignac number, because 500056000021 - 2¹³ = 500055991829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (500056000051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250028000010 + 250028000011.

It is an arithmetic number, because the mean of its divisors is an integer number (250028000011).

Almost surely, 2^500056000021 is an apocalyptic number.

It is an amenable number.

500056000021 is a deficient number, since it is larger than the sum of its proper divisors (1).

500056000021 is an equidigital number, since it uses as much as digits as its factorization.

500056000021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 300, while the sum is 19.

Adding to 500056000021 its reverse (120000650005), we get a palindrome (620056650026).

The spelling of 500056000021 in words is "five hundred billion, fifty-six million, twenty-one", and thus it is an aban number.