442003221 has 48 divisors (see below), whose sum is σ = 726393408. Its totient is φ = 256608000.

The previous prime is 442003189. The next prime is 442003231. The reversal of 442003221 is 122300244.

442003221 is a `hidden beast` number, since 442 + 0 + 0 + 3 + 221 = 666.

It is not a de Polignac number, because 442003221 - 2⁵ = 442003189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 442003194 and 442003203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442003231) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 244521 + ... + 246321.

It is an arithmetic number, because the mean of its divisors is an integer number (15133196).

Almost surely, 2^442003221 is an apocalyptic number.

It is an amenable number.

442003221 is a deficient number, since it is larger than the sum of its proper divisors (284390187).

442003221 is a wasteful number, since it uses less digits than its factorization.

442003221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1922 (or 1919 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 442003221 is about 21023.8726451622. The cubic root of 442003221 is about 761.7430106580.

Adding to 442003221 its reverse (122300244), we get a palindrome (564303465).

The spelling of 442003221 in words is "four hundred forty-two million, three thousand, two hundred twenty-one".