222001165 has 4 divisors (see below), whose sum is σ = 266401404. Its totient is φ = 177600928.

The previous prime is 222001159. The next prime is 222001201. The reversal of 222001165 is 561100222.

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 160833124 + 61168041 = 12682^2 + 7821^2 .

It is a cyclic number.

It is not a de Polignac number, because 222001165 - 2²³ = 213612557 is a prime.

It is a super-2 number, since 2×222001165² = 98569034522714450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22200112 + ... + 22200121.

It is an arithmetic number, because the mean of its divisors is an integer number (66600351).

Almost surely, 2^222001165 is an apocalyptic number.

It is an amenable number.

222001165 is a deficient number, since it is larger than the sum of its proper divisors (44400239).

222001165 is an equidigital number, since it uses as much as digits as its factorization.

222001165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44400238.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 222001165 is about 14899.7035205403. The cubic root of 222001165 is about 605.5059538282.

Adding to 222001165 its reverse (561100222), we get a palindrome (783101387).

The spelling of 222001165 in words is "two hundred twenty-two million, one thousand, one hundred sixty-five".