221862224 has 10 divisors (see below), whose sum is σ = 429858090. Its totient is φ = 110931104.

The previous prime is 221862217. The next prime is 221862229. The reversal of 221862224 is 422268122.

221862224 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 204490000 + 17372224 = 14300^2 + 4168^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221862229) 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 as a sum of consecutive naturals, namely, 6933179 + ... + 6933210.

It is an arithmetic number, because the mean of its divisors is an integer number (42985809).

Almost surely, 2^221862224 is an apocalyptic number.

It is an amenable number.

221862224 is a deficient number, since it is larger than the sum of its proper divisors (207995866).

221862224 is a wasteful number, since it uses less digits than its factorization.

221862224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13866397 (or 13866391 counting only the distinct ones).

The product of its digits is 6144, while the sum is 29.

The square root of 221862224 is about 14895.0402483511. The cubic root of 221862224 is about 605.3796074044.

The spelling of 221862224 in words is "two hundred twenty-one million, eight hundred sixty-two thousand, two hundred twenty-four".