222840656 has 20 divisors (see below), whose sum is σ = 432472692. Its totient is φ = 111234816.

The previous prime is 222840649. The next prime is 222840691. The reversal of 222840656 is 656048222.

It can be written as a sum of positive squares in 2 ways, for example, as 9096256 + 213744400 = 3016^2 + 14620^2 .

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1415 + ... + 21158.

Almost surely, 2^222840656 is an apocalyptic number.

It is an amenable number.

222840656 is a deficient number, since it is larger than the sum of its proper divisors (209632036).

222840656 is a wasteful number, since it uses less digits than its factorization.

222840656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23198 (or 23192 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 35.

The square root of 222840656 is about 14927.8483379220. The cubic root of 222840656 is about 606.2682282258.

Adding to 222840656 its reverse (656048222), we get a palindrome (878888878).

The spelling of 222840656 in words is "two hundred twenty-two million, eight hundred forty thousand, six hundred fifty-six".