190221 has 8 divisors (see below), whose sum is σ = 255840. Its totient is φ = 125712.

The previous prime is 190207. The next prime is 190243. The reversal of 190221 is 122091.

It is a happy number.

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

It is not a de Polignac number, because 190221 - 2⁷ = 190093 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 190221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190261) 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, 295 + ... + 683.

It is an arithmetic number, because the mean of its divisors is an integer number (31980).

2¹⁹⁰²²¹ is an apocalyptic number.

It is an amenable number.

190221 is a deficient number, since it is larger than the sum of its proper divisors (65619).

190221 is a wasteful number, since it uses less digits than its factorization.

190221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 190221 is about 436.1433250664. The cubic root of 190221 is about 57.5112517363.

The spelling of 190221 in words is "one hundred ninety thousand, two hundred twenty-one".