50556005221 has 4 divisors (see below), whose sum is σ = 50602092012. Its totient is φ = 50509918432.

The previous prime is 50556005219. The next prime is 50556005261. The reversal of 50556005221 is 12250065505.

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 11554100100 + 39001905121 = 107490^2 + 197489^2 .

It is a cyclic number.

It is not a de Polignac number, because 50556005221 - 2¹ = 50556005219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50556005261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23041750 + ... + 23043943.

It is an arithmetic number, because the mean of its divisors is an integer number (12650523003).

Almost surely, 2^50556005221 is an apocalyptic number.

It is an amenable number.

50556005221 is a deficient number, since it is larger than the sum of its proper divisors (46086791).

50556005221 is a wasteful number, since it uses less digits than its factorization.

50556005221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46086790.

The product of its (nonzero) digits is 15000, while the sum is 31.

The spelling of 50556005221 in words is "fifty billion, five hundred fifty-six million, five thousand, two hundred twenty-one".