222305644 has 12 divisors (see below), whose sum is σ = 424401768. Its totient is φ = 101048000.

The previous prime is 222305627. The next prime is 222305647. The reversal of 222305644 is 446503222.

It is not an unprimeable number, because it can be changed into a prime (222305647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2526157 + ... + 2526244.

It is an arithmetic number, because the mean of its divisors is an integer number (35366814).

Almost surely, 2^222305644 is an apocalyptic number.

It is an amenable number.

222305644 is a deficient number, since it is larger than the sum of its proper divisors (202096124).

222305644 is a wasteful number, since it uses less digits than its factorization.

222305644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5052416 (or 5052414 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 28.

The square root of 222305644 is about 14909.9176389409. The cubic root of 222305644 is about 605.7826485102.

Adding to 222305644 its reverse (446503222), we get a palindrome (668808866).

The spelling of 222305644 in words is "two hundred twenty-two million, three hundred five thousand, six hundred forty-four".