221235222 has 32 divisors (see below), whose sum is σ = 477382752. Its totient is φ = 67947264.

The previous prime is 221235211. The next prime is 221235239. The reversal of 221235222 is 222532122.

221235222 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45828 + ... + 50424.

It is an arithmetic number, because the mean of its divisors is an integer number (14918211).

Almost surely, 2^221235222 is an apocalyptic number.

221235222 is an abundant number, since it is smaller than the sum of its proper divisors (256147530).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221235222 is a wasteful number, since it uses less digits than its factorization.

221235222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5232.

The product of its digits is 960, while the sum is 21.

The square root of 221235222 is about 14873.9780153125. The cubic root of 221235222 is about 604.8087841397.

Adding to 221235222 its reverse (222532122), we get a palindrome (443767344).

The spelling of 221235222 in words is "two hundred twenty-one million, two hundred thirty-five thousand, two hundred twenty-two".