222644 has 6 divisors (see below), whose sum is σ = 389634. Its totient is φ = 111320.

The previous prime is 222643. The next prime is 222647. The reversal of 222644 is 446222.

It can be written as a sum of positive squares in only one way, i.e., 169744 + 52900 = 412^2 + 230^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27827 + ... + 27834.

It is an arithmetic number, because the mean of its divisors is an integer number (64939).

2²²²⁶⁴⁴ is an apocalyptic number.

It is an amenable number.

222644 is a deficient number, since it is larger than the sum of its proper divisors (166990).

222644 is a wasteful number, since it uses less digits than its factorization.

222644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55665 (or 55663 counting only the distinct ones).

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

The square root of 222644 is about 471.8516716088. The cubic root of 222644 is about 60.6089832631.

Adding to 222644 its reverse (446222), we get a palindrome (668866).

The spelling of 222644 in words is "two hundred twenty-two thousand, six hundred forty-four".