221422424 has 32 divisors (see below), whose sum is σ = 430693200. Its totient is φ = 106592640.

The previous prime is 221422423. The next prime is 221422459. The reversal of 221422424 is 424224122.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 221422424.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221422423) 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 7 ways as a sum of consecutive naturals, for example, 96539 + ... + 98805.

Almost surely, 2^221422424 is an apocalyptic number.

It is an amenable number.

221422424 is a deficient number, since it is larger than the sum of its proper divisors (209270776).

221422424 is a wasteful number, since it uses less digits than its factorization.

221422424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2723 (or 2719 counting only the distinct ones).

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

The square root of 221422424 is about 14880.2696212132. The cubic root of 221422424 is about 604.9793258423.

Adding to 221422424 its reverse (424224122), we get a palindrome (645646546).

The spelling of 221422424 in words is "two hundred twenty-one million, four hundred twenty-two thousand, four hundred twenty-four".