221624222 has 8 divisors (see below), whose sum is σ = 333828000. Its totient is φ = 110348224.

The previous prime is 221624213. The next prime is 221624233. The reversal of 221624222 is 222426122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 231347 + ... + 232302.

It is an arithmetic number, because the mean of its divisors is an integer number (41728500).

Almost surely, 2^221624222 is an apocalyptic number.

221624222 is a deficient number, since it is larger than the sum of its proper divisors (112203778).

221624222 is a wasteful number, since it uses less digits than its factorization.

221624222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463890.

The product of its digits is 1536, while the sum is 23.

The square root of 221624222 is about 14887.0488008873. The cubic root of 221624222 is about 605.1630569308.

The spelling of 221624222 in words is "two hundred twenty-one million, six hundred twenty-four thousand, two hundred twenty-two".