222016644 has 18 divisors (see below), whose sum is σ = 561208830. Its totient is φ = 74005536.

The previous prime is 222016633. The next prime is 222016649. The reversal of 222016644 is 446610222.

222016644 is a `hidden beast` number, since 2 + 2 + 2 + 0 + 16 + 644 = 666.

222016644 is digitally balanced in base 2 and base 3, because in such bases 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., 200505600 + 21511044 = 14160^2 + 4638^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (222016649) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3083529 + ... + 3083600.

Almost surely, 2^222016644 is an apocalyptic number.

It is an amenable number.

222016644 is an abundant number, since it is smaller than the sum of its proper divisors (339192186).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

222016644 is a wasteful number, since it uses less digits than its factorization.

222016644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6167139 (or 6167134 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 222016644 is about 14900.2229513521. Note that the first 3 decimals coincide. The cubic root of 222016644 is about 605.5200264403.

Adding to 222016644 its reverse (446610222), we get a palindrome (668626866).

The spelling of 222016644 in words is "two hundred twenty-two million, sixteen thousand, six hundred forty-four".