442410221 has 32 divisors (see below), whose sum is σ = 522160128. Its totient is φ = 370751040.

The previous prime is 442410203. The next prime is 442410253. The reversal of 442410221 is 122014244.

It is a de Polignac number, because none of the positive numbers 2^k-442410221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 442410193 and 442410202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442410721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1563146 + ... + 1563428.

It is an arithmetic number, because the mean of its divisors is an integer number (16317504).

Almost surely, 2^442410221 is an apocalyptic number.

It is an amenable number.

442410221 is a deficient number, since it is larger than the sum of its proper divisors (79749907).

442410221 is a wasteful number, since it uses less digits than its factorization.

442410221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521.

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 442410221 is about 21033.5498905915. The cubic root of 442410221 is about 761.9767452253.

Adding to 442410221 its reverse (122014244), we get a palindrome (564424465).

The spelling of 442410221 in words is "four hundred forty-two million, four hundred ten thousand, two hundred twenty-one".