442423222 has 4 divisors (see below), whose sum is σ = 663634836. Its totient is φ = 221211610.

The previous prime is 442423211. The next prime is 442423229. The reversal of 442423222 is 222324244.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×442423222² = 391476614729722568, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442423229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110605804 + ... + 110605807.

It is an arithmetic number, because the mean of its divisors is an integer number (165908709).

Almost surely, 2^442423222 is an apocalyptic number.

442423222 is a deficient number, since it is larger than the sum of its proper divisors (221211614).

442423222 is a wasteful number, since it uses less digits than its factorization.

442423222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221211613.

The product of its digits is 6144, while the sum is 25.

The square root of 442423222 is about 21033.8589421913. The cubic root of 442423222 is about 761.9842091597.

Adding to 442423222 its reverse (222324244), we get a palindrome (664747466).

The spelling of 442423222 in words is "four hundred forty-two million, four hundred twenty-three thousand, two hundred twenty-two".