221206622 has 16 divisors (see below), whose sum is σ = 408381792. Its totient is φ = 87510240.

The previous prime is 221206621. The next prime is 221206627. The reversal of 221206622 is 226602122.

221206622 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221206621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 607529 + ... + 607892.

It is an arithmetic number, because the mean of its divisors is an integer number (25523862).

Almost surely, 2^221206622 is an apocalyptic number.

221206622 is a deficient number, since it is larger than the sum of its proper divisors (187175170).

221206622 is a wasteful number, since it uses less digits than its factorization.

221206622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1215443.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 221206622 is about 14873.0165736477. The cubic root of 221206622 is about 604.7827209651.

Adding to 221206622 its reverse (226602122), we get a palindrome (447808744).

The spelling of 221206622 in words is "two hundred twenty-one million, two hundred six thousand, six hundred twenty-two".