220465165 has 4 divisors (see below), whose sum is σ = 264558204. Its totient is φ = 176372128.

The previous prime is 220465139. The next prime is 220465169. The reversal of 220465165 is 561564022.

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 170720356 + 49744809 = 13066^2 + 7053^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220465165 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220465169) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22046512 + ... + 22046521.

It is an arithmetic number, because the mean of its divisors is an integer number (66139551).

Almost surely, 2^220465165 is an apocalyptic number.

It is an amenable number.

220465165 is a deficient number, since it is larger than the sum of its proper divisors (44093039).

220465165 is an equidigital number, since it uses as much as digits as its factorization.

220465165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44093038.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 220465165 is about 14848.0694031244. The cubic root of 220465165 is about 604.1062458377.

The spelling of 220465165 in words is "two hundred twenty million, four hundred sixty-five thousand, one hundred sixty-five".