222044665 has 4 divisors (see below), whose sum is σ = 266453604. Its totient is φ = 177635728.

The previous prime is 222044651. The next prime is 222044681. The reversal of 222044665 is 566440222.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 566440222 = 2 ⋅283220111.

It can be written as a sum of positive squares in 2 ways, for example, as 51036736 + 171007929 = 7144^2 + 13077^2 .

It is a cyclic number.

It is not a de Polignac number, because 222044665 - 2²⁵ = 188490233 is a prime.

It is a super-3 number, since 3×222044665³ (a number of 26 digits) contains 333 as substring.

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, 22204462 + ... + 22204471.

It is an arithmetic number, because the mean of its divisors is an integer number (66613401).

Almost surely, 2^222044665 is an apocalyptic number.

It is an amenable number.

222044665 is a deficient number, since it is larger than the sum of its proper divisors (44408939).

222044665 is an equidigital number, since it uses as much as digits as its factorization.

222044665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44408938.

The product of its (nonzero) digits is 23040, while the sum is 31.

The square root of 222044665 is about 14901.1632096290. The cubic root of 222044665 is about 605.5454998502.

Adding to 222044665 its reverse (566440222), we get a palindrome (788484887).

The spelling of 222044665 in words is "two hundred twenty-two million, forty-four thousand, six hundred sixty-five".