221422004 has 12 divisors (see below), whose sum is σ = 387659328. Its totient is φ = 110662200.

The previous prime is 221422001. The next prime is 221422013. The reversal of 221422004 is 400224122.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221422001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 812 + ... + 21059.

It is an arithmetic number, because the mean of its divisors is an integer number (32304944).

Almost surely, 2^221422004 is an apocalyptic number.

It is an amenable number.

221422004 is a deficient number, since it is larger than the sum of its proper divisors (166237324).

221422004 is a wasteful number, since it uses less digits than its factorization.

221422004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24406 (or 24404 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 221422004 is about 14880.2555085590. The cubic root of 221422004 is about 604.9789433283.

Adding to 221422004 its reverse (400224122), we get a palindrome (621646126).

The spelling of 221422004 in words is "two hundred twenty-one million, four hundred twenty-two thousand, four".