190402221 has 8 divisors (see below), whose sum is σ = 255487264. Its totient is φ = 126126000.

The previous prime is 190402213. The next prime is 190402231. The reversal of 190402221 is 122204091.

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

It is not a de Polignac number, because 190402221 - 2³ = 190402213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190402231) 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, 201655 + ... + 202596.

It is an arithmetic number, because the mean of its divisors is an integer number (31935908).

Almost surely, 2^190402221 is an apocalyptic number.

It is an amenable number.

190402221 is a deficient number, since it is larger than the sum of its proper divisors (65085043).

190402221 is a wasteful number, since it uses less digits than its factorization.

190402221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404411.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 190402221 is about 13798.6311277605. The cubic root of 190402221 is about 575.2950933949.

The spelling of 190402221 in words is "one hundred ninety million, four hundred two thousand, two hundred twenty-one".