221199994 has 16 divisors (see below), whose sum is σ = 344373120. Its totient is φ = 106434160.

The previous prime is 221199991. The next prime is 221200009. The reversal of 221199994 is 499991122.

It is not an unprimeable number, because it can be changed into a prime (221199991) 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, 11907 + ... + 24169.

It is an arithmetic number, because the mean of its divisors is an integer number (21523320).

Almost surely, 2^221199994 is an apocalyptic number.

221199994 is a deficient number, since it is larger than the sum of its proper divisors (123173126).

221199994 is a wasteful number, since it uses less digits than its factorization.

221199994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12605.

The product of its digits is 104976, while the sum is 46.

The square root of 221199994 is about 14872.7937523520. The cubic root of 221199994 is about 604.7766805493.

The spelling of 221199994 in words is "two hundred twenty-one million, one hundred ninety-nine thousand, nine hundred ninety-four".