500050055521 has 4 divisors (see below), whose sum is σ = 500056723732. Its totient is φ = 500043387312.

The previous prime is 500050055513. The next prime is 500050055539. The reversal of 500050055521 is 125550050005.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 100454133025 + 399595922496 = 316945^2 + 632136^2 .

It is a cyclic number.

It is not a de Polignac number, because 500050055521 - 2³ = 500050055513 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 500050055521.

It is not an unprimeable number, because it can be changed into a prime (500050055591) 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 3 ways as a sum of consecutive naturals, for example, 3220326 + ... + 3372031.

It is an arithmetic number, because the mean of its divisors is an integer number (125014180933).

Almost surely, 2^500050055521 is an apocalyptic number.

It is an amenable number.

500050055521 is a deficient number, since it is larger than the sum of its proper divisors (6668211).

500050055521 is an equidigital number, since it uses as much as digits as its factorization.

500050055521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6668210.

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

The spelling of 500050055521 in words is "five hundred billion, fifty million, fifty-five thousand, five hundred twenty-one".