442421222 has 4 divisors (see below), whose sum is σ = 663631836. Its totient is φ = 221210610.

The previous prime is 442421219. The next prime is 442421249. The reversal of 442421222 is 222124244.

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

It is a congruent number.

It is an unprimeable number.

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, 110605304 + ... + 110605307.

It is an arithmetic number, because the mean of its divisors is an integer number (165907959).

Almost surely, 2^442421222 is an apocalyptic number.

442421222 is a deficient number, since it is larger than the sum of its proper divisors (221210614).

442421222 is a wasteful number, since it uses less digits than its factorization.

442421222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221210613.

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

The square root of 442421222 is about 21033.8113997440. The cubic root of 442421222 is about 761.9830609599.

Adding to 442421222 its reverse (222124244), we get a palindrome (664545466).

The spelling of 442421222 in words is "four hundred forty-two million, four hundred twenty-one thousand, two hundred twenty-two".