220312265 has 16 divisors (see below), whose sum is σ = 285887232. Its totient is φ = 162349824.

The previous prime is 220312243. The next prime is 220312271. The reversal of 220312265 is 562213022.

It is a cyclic number.

It is not a de Polignac number, because 220312265 - 2²⁰ = 219263689 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 220312265.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 23579 + ... + 31568.

It is an arithmetic number, because the mean of its divisors is an integer number (17867952).

Almost surely, 2^220312265 is an apocalyptic number.

It is an amenable number.

220312265 is a deficient number, since it is larger than the sum of its proper divisors (65574967).

220312265 is a wasteful number, since it uses less digits than its factorization.

220312265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55216.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 220312265 is about 14842.9196925672. The cubic root of 220312265 is about 603.9665575464.

Adding to 220312265 its reverse (562213022), we get a palindrome (782525287).

The spelling of 220312265 in words is "two hundred twenty million, three hundred twelve thousand, two hundred sixty-five".