222122665 has 4 divisors (see below), whose sum is σ = 266547204. Its totient is φ = 177698128.

The previous prime is 222122653. The next prime is 222122671. The reversal of 222122665 is 566221222.

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 37896336 + 184226329 = 6156^2 + 13573^2 .

It is a cyclic number.

It is not a de Polignac number, because 222122665 - 2⁵ = 222122633 is a prime.

It is a Duffinian 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, 22212262 + ... + 22212271.

It is an arithmetic number, because the mean of its divisors is an integer number (66636801).

Almost surely, 2^222122665 is an apocalyptic number.

It is an amenable number.

222122665 is a deficient number, since it is larger than the sum of its proper divisors (44424539).

222122665 is an equidigital number, since it uses as much as digits as its factorization.

222122665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44424538.

The product of its digits is 5760, while the sum is 28.

The square root of 222122665 is about 14903.7802251644. The cubic root of 222122665 is about 605.6163970267.

Adding to 222122665 its reverse (566221222), we get a palindrome (788343887).

The spelling of 222122665 in words is "two hundred twenty-two million, one hundred twenty-two thousand, six hundred sixty-five".