220240165 has 4 divisors (see below), whose sum is σ = 264288204. Its totient is φ = 176192128.

The previous prime is 220240159. The next prime is 220240171. The reversal of 220240165 is 561042022.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 561042022 = 2 ⋅280521011.

It is an interprime number because it is at equal distance from previous prime (220240159) and next prime (220240171).

It can be written as a sum of positive squares in 2 ways, for example, as 166745569 + 53494596 = 12913^2 + 7314^2 .

It is a cyclic number.

It is not a de Polignac number, because 220240165 - 2⁷ = 220240037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22024012 + ... + 22024021.

It is an arithmetic number, because the mean of its divisors is an integer number (66072051).

Almost surely, 2^220240165 is an apocalyptic number.

It is an amenable number.

220240165 is a deficient number, since it is larger than the sum of its proper divisors (44048039).

220240165 is an equidigital number, since it uses as much as digits as its factorization.

220240165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44048038.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 220240165 is about 14840.4907263877. The cubic root of 220240165 is about 603.9006651035.

Adding to 220240165 its reverse (561042022), we get a palindrome (781282187).

The spelling of 220240165 in words is "two hundred twenty million, two hundred forty thousand, one hundred sixty-five".