221019194 has 16 divisors (see below), whose sum is σ = 361928736. Its totient is φ = 100390800.

The previous prime is 221019173. The next prime is 221019217. The reversal of 221019194 is 491910122.

221019194 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38384 + ... + 43764.

It is an arithmetic number, because the mean of its divisors is an integer number (22620546).

Almost surely, 2^221019194 is an apocalyptic number.

221019194 is a deficient number, since it is larger than the sum of its proper divisors (140909542).

221019194 is a wasteful number, since it uses less digits than its factorization.

221019194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7261.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 221019194 is about 14866.7142973826. The cubic root of 221019194 is about 604.6118622381.

The spelling of 221019194 in words is "two hundred twenty-one million, nineteen thousand, one hundred ninety-four".