442224221 has 8 divisors (see below), whose sum is σ = 467866080. Its totient is φ = 416819088.

The previous prime is 442224173. The next prime is 442224239. The reversal of 442224221 is 122422244.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-442224221 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 (442224271) 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, 55331 + ... + 62816.

It is an arithmetic number, because the mean of its divisors is an integer number (58483260).

Almost surely, 2^442224221 is an apocalyptic number.

It is an amenable number.

442224221 is a deficient number, since it is larger than the sum of its proper divisors (25641859).

442224221 is a wasteful number, since it uses less digits than its factorization.

442224221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118363.

The product of its digits is 2048, while the sum is 23.

The square root of 442224221 is about 21029.1279181996. The cubic root of 442224221 is about 761.8699457479.

Adding to 442224221 its reverse (122422244), we get a palindrome (564646465).

The spelling of 442224221 in words is "four hundred forty-two million, two hundred twenty-four thousand, two hundred twenty-one".