50821221 has 16 divisors (see below), whose sum is σ = 74041920. Its totient is φ = 30750720.

The previous prime is 50821171. The next prime is 50821229. The reversal of 50821221 is 12212805.

It is a happy number.

50821221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 50821221 - 2⁶ = 50821157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50821229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35365 + ... + 36773.

It is an arithmetic number, because the mean of its divisors is an integer number (4627620).

Almost surely, 2^50821221 is an apocalyptic number.

It is an amenable number.

50821221 is a deficient number, since it is larger than the sum of its proper divisors (23220699).

50821221 is a wasteful number, since it uses less digits than its factorization.

50821221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2516.

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 50821221 is about 7128.9004060935. The cubic root of 50821221 is about 370.4091432178.

The spelling of 50821221 in words is "fifty million, eight hundred twenty-one thousand, two hundred twenty-one".