221422245 has 32 divisors (see below), whose sum is σ = 396938880. Its totient is φ = 104451840.

The previous prime is 221422241. The next prime is 221422247. The reversal of 221422245 is 542224122.

It is not a de Polignac number, because 221422245 - 2² = 221422241 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221422241) 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 31 ways as a sum of consecutive naturals, for example, 12030 + ... + 24239.

It is an arithmetic number, because the mean of its divisors is an integer number (12404340).

Almost surely, 2^221422245 is an apocalyptic number.

It is an amenable number.

221422245 is a deficient number, since it is larger than the sum of its proper divisors (175516635).

221422245 is a wasteful number, since it uses less digits than its factorization.

221422245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36325.

The product of its digits is 2560, while the sum is 24.

The square root of 221422245 is about 14880.2636065360. The cubic root of 221422245 is about 604.9791628185.

Adding to 221422245 its reverse (542224122), we get a palindrome (763646367).

The spelling of 221422245 in words is "two hundred twenty-one million, four hundred twenty-two thousand, two hundred forty-five".