50216511221 has 4 divisors (see below), whose sum is σ = 50271877632. Its totient is φ = 50161144812.

The previous prime is 50216511151. The next prime is 50216511253. The reversal of 50216511221 is 12211561205.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 50216511221 - 2²⁶ = 50149402357 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 (50216531221) 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, 27681845 + ... + 27683658.

It is an arithmetic number, because the mean of its divisors is an integer number (12567969408).

Almost surely, 2^50216511221 is an apocalyptic number.

It is an amenable number.

50216511221 is a deficient number, since it is larger than the sum of its proper divisors (55366411).

50216511221 is an equidigital number, since it uses as much as digits as its factorization.

50216511221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55366410.

The product of its (nonzero) digits is 1200, while the sum is 26.

The spelling of 50216511221 in words is "fifty billion, two hundred sixteen million, five hundred eleven thousand, two hundred twenty-one".