221198 has 8 divisors (see below), whose sum is σ = 349320. Its totient is φ = 104760.

The previous prime is 221197. The next prime is 221201. The reversal of 221198 is 891122.

221198 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2873 + ... + 2948.

It is an arithmetic number, because the mean of its divisors is an integer number (43665).

2²²¹¹⁹⁸ is an apocalyptic number.

221198 is a deficient number, since it is larger than the sum of its proper divisors (128122).

221198 is a wasteful number, since it uses less digits than its factorization.

221198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5842.

The product of its digits is 288, while the sum is 23.

The square root of 221198 is about 470.3169144311. The cubic root of 221198 is about 60.4774863297.

The spelling of 221198 in words is "two hundred twenty-one thousand, one hundred ninety-eight".