442233217921 has 16 divisors (see below), whose sum is σ = 499257367488. Its totient is φ = 388178481600.

The previous prime is 442233217901. The next prime is 442233217931. The reversal of 442233217921 is 129712332244.

It is a cyclic number.

It is not a de Polignac number, because 442233217921 - 2¹⁹ = 442232693633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (442233217901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4093890 + ... + 4200523.

It is an arithmetic number, because the mean of its divisors is an integer number (31203585468).

Almost surely, 2^442233217921 is an apocalyptic number.

It is an amenable number.

442233217921 is a deficient number, since it is larger than the sum of its proper divisors (57024149567).

442233217921 is a wasteful number, since it uses less digits than its factorization.

442233217921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8294592.

The product of its digits is 145152, while the sum is 40.

The spelling of 442233217921 in words is "four hundred forty-two billion, two hundred thirty-three million, two hundred seventeen thousand, nine hundred twenty-one".