222193778689 has 8 divisors (see below), whose sum is σ = 225269686152. Its totient is φ = 219118740480.

The previous prime is 222193778687. The next prime is 222193778693. The reversal of 222193778689 is 986877391222.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 42587338689 + 179606440000 = 206367^2 + 423800^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 222193778689 - 2¹ = 222193778687 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 222193778689.

It is not an unprimeable number, because it can be changed into a prime (222193778687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 306117 + ... + 733549.

It is an arithmetic number, because the mean of its divisors is an integer number (28158710769).

It is a Proth number, since it is equal to 423801 ⋅ 2¹⁹ + 1 and 423801 < 2¹⁹.

Almost surely, 2^222193778689 is an apocalyptic number.

It is an amenable number.

222193778689 is a deficient number, since it is larger than the sum of its proper divisors (3075907463).

222193778689 is an equidigital number, since it uses as much as digits as its factorization.

222193778689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434627.

The product of its digits is 36578304, while the sum is 64.

The spelling of 222193778689 in words is "two hundred twenty-two billion, one hundred ninety-three million, seven hundred seventy-eight thousand, six hundred eighty-nine".