442190221 has 8 divisors (see below), whose sum is σ = 487166688. Its totient is φ = 398010000.

The previous prime is 442190197. The next prime is 442190239. The reversal of 442190221 is 122091244.

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

It is a cyclic number.

It is not a de Polignac number, because 442190221 - 2⁷ = 442190093 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 (442190321) 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, 197895 + ... + 200116.

It is an arithmetic number, because the mean of its divisors is an integer number (60895836).

Almost surely, 2^442190221 is an apocalyptic number.

It is an amenable number.

442190221 is a deficient number, since it is larger than the sum of its proper divisors (44976467).

442190221 is a wasteful number, since it uses less digits than its factorization.

442190221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398123.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 442190221 is about 21028.3195001408. The cubic root of 442190221 is about 761.8504200256.

The spelling of 442190221 in words is "four hundred forty-two million, one hundred ninety thousand, two hundred twenty-one".