221911796 has 12 divisors (see below), whose sum is σ = 389316900. Its totient is φ = 110678400.

The previous prime is 221911793. The next prime is 221911801. The reversal of 221911796 is 697119122.

221911796 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 140659600 + 81252196 = 11860^2 + 9014^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221911793) 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, 67571 + ... + 70778.

It is an arithmetic number, because the mean of its divisors is an integer number (32443075).

Almost surely, 2^221911796 is an apocalyptic number.

It is an amenable number.

221911796 is a deficient number, since it is larger than the sum of its proper divisors (167405104).

221911796 is a wasteful number, since it uses less digits than its factorization.

221911796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138754 (or 138752 counting only the distinct ones).

The product of its digits is 13608, while the sum is 38.

The square root of 221911796 is about 14896.7041992516. The cubic root of 221911796 is about 605.4246919055.

The spelling of 221911796 in words is "two hundred twenty-one million, nine hundred eleven thousand, seven hundred ninety-six".