222001117 has 4 divisors (see below), whose sum is σ = 239078140. Its totient is φ = 204924096.

The previous prime is 222001099. The next prime is 222001121. The reversal of 222001117 is 711100222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 125686521 + 96314596 = 11211^2 + 9814^2 .

It is a de Polignac number, because none of the positive numbers 2^k-222001117 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 222001117.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222001817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8538492 + ... + 8538517.

It is an arithmetic number, because the mean of its divisors is an integer number (59769535).

Almost surely, 2^222001117 is an apocalyptic number.

It is an amenable number.

222001117 is a deficient number, since it is larger than the sum of its proper divisors (17077023).

222001117 is a wasteful number, since it uses less digits than its factorization.

222001117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17077022.

The product of its (nonzero) digits is 56, while the sum is 16.

The square root of 222001117 is about 14899.7019097699. The cubic root of 222001117 is about 605.5059101884.

Adding to 222001117 its reverse (711100222), we get a palindrome (933101339).

The spelling of 222001117 in words is "two hundred twenty-two million, one thousand, one hundred seventeen".