222878635226 has 16 divisors (see below), whose sum is σ = 369765388104. Its totient is φ = 100086871104.

The previous prime is 222878635211. The next prime is 222878635229. The reversal of 222878635226 is 622536878222.

222878635226 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 161723818201 + 61154817025 = 402149^2 + 247295^2 .

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (222878635229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115840325 + ... + 115842248.

Almost surely, 2^222878635226 is an apocalyptic number.

222878635226 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

222878635226 is a deficient number, since it is larger than the sum of its proper divisors (146886752878).

222878635226 is a wasteful number, since it uses less digits than its factorization.

222878635226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231682625.

The product of its digits is 7741440, while the sum is 53.

The spelling of 222878635226 in words is "two hundred twenty-two billion, eight hundred seventy-eight million, six hundred thirty-five thousand, two hundred twenty-six".