222222227777789 has 2 divisors, whose sum is σ = 222222227777790. Its totient is φ = 222222227777788.

The previous prime is 222222227777731. The next prime is 222222227777903. The reversal of 222222227777789 is 987777722222222.

222222227777789 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 188626409261689 + 33595818516100 = 13734133^2 + 5796190^2 .

It is a cyclic number.

It is not a de Polignac number, because 222222227777789 - 2²⁸ = 222221959342333 is a prime.

It is a plaindrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222222227737789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111111113888894 + 111111113888895.

It is an arithmetic number, because the mean of its divisors is an integer number (111111113888895).

Almost surely, 2^{222222227777789} is an apocalyptic number.

It is an amenable number.

222222227777789 is a deficient number, since it is larger than the sum of its proper divisors (1).

222222227777789 is an equidigital number, since it uses as much as digits as its factorization.

222222227777789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 309786624, while the sum is 68.

The spelling of 222222227777789 in words is "two hundred twenty-two trillion, two hundred twenty-two billion, two hundred twenty-seven million, seven hundred seventy-seven thousand, seven hundred eighty-nine".