221422430 has 16 divisors (see below), whose sum is σ = 409332960. Its totient is φ = 86175072.

The previous prime is 221422423. The next prime is 221422459. The reversal of 221422430 is 34224122.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 298850 + ... + 299589.

It is an arithmetic number, because the mean of its divisors is an integer number (25583310).

Almost surely, 2^221422430 is an apocalyptic number.

221422430 is a deficient number, since it is larger than the sum of its proper divisors (187910530).

221422430 is a wasteful number, since it uses less digits than its factorization.

221422430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 598483.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 221422430 is about 14880.2698228224. The cubic root of 221422430 is about 604.9793313067.

Adding to 221422430 its reverse (34224122), we get a palindrome (255646552).

The spelling of 221422430 in words is "two hundred twenty-one million, four hundred twenty-two thousand, four hundred thirty".