222774918 has 16 divisors (see below), whose sum is σ = 464921856. Its totient is φ = 71029640.

The previous prime is 222774913. The next prime is 222774931. The reversal of 222774918 is 819477222.

222774918 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 222774918.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222774913) 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 in 7 ways as a sum of consecutive naturals, for example, 807018 + ... + 807293.

It is an arithmetic number, because the mean of its divisors is an integer number (29057616).

Almost surely, 2^222774918 is an apocalyptic number.

222774918 is an abundant number, since it is smaller than the sum of its proper divisors (242146938).

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

222774918 is a wasteful number, since it uses less digits than its factorization.

222774918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1614339.

The product of its digits is 112896, while the sum is 42.

The square root of 222774918 is about 14925.6463176641. The cubic root of 222774918 is about 606.2086059809.

The spelling of 222774918 in words is "two hundred twenty-two million, seven hundred seventy-four thousand, nine hundred eighteen".