220442165 has 4 divisors (see below), whose sum is σ = 264530604. Its totient is φ = 176353728.

The previous prime is 220442119. The next prime is 220442191. The reversal of 220442165 is 561244022.

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 137686756 + 82755409 = 11734^2 + 9097^2 .

It is a cyclic number.

It is not a de Polignac number, because 220442165 - 2¹⁰ = 220441141 is a prime.

It is a Duffinian number.

It is a Curzon 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, 22044212 + ... + 22044221.

It is an arithmetic number, because the mean of its divisors is an integer number (66132651).

Almost surely, 2^220442165 is an apocalyptic number.

It is an amenable number.

220442165 is a deficient number, since it is larger than the sum of its proper divisors (44088439).

220442165 is an equidigital number, since it uses as much as digits as its factorization.

220442165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44088438.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 220442165 is about 14847.2948714572. The cubic root of 220442165 is about 604.0852373383.

Adding to 220442165 its reverse (561244022), we get a palindrome (781686187).

The spelling of 220442165 in words is "two hundred twenty million, four hundred forty-two thousand, one hundred sixty-five".