220744165 has 4 divisors (see below), whose sum is σ = 264893004. Its totient is φ = 176595328.

The previous prime is 220744159. The next prime is 220744169. The reversal of 220744165 is 561447022.

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 34093921 + 186650244 = 5839^2 + 13662^2 .

It is a cyclic number.

It is not a de Polignac number, because 220744165 - 2³ = 220744157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220744169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22074412 + ... + 22074421.

It is an arithmetic number, because the mean of its divisors is an integer number (66223251).

Almost surely, 2^220744165 is an apocalyptic number.

It is an amenable number.

220744165 is a deficient number, since it is larger than the sum of its proper divisors (44148839).

220744165 is an equidigital number, since it uses as much as digits as its factorization.

220744165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44148838.

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 220744165 is about 14857.4615934217. The cubic root of 220744165 is about 604.3609717851.

The spelling of 220744165 in words is "two hundred twenty million, seven hundred forty-four thousand, one hundred sixty-five".