2631321265 has 16 divisors (see below), whose sum is σ = 3175901568. Its totient is φ = 2092882176.

The previous prime is 2631321221. The next prime is 2631321271. The reversal of 2631321265 is 5621231362.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2631321265 - 2⁹ = 2631320753 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 709897 + ... + 713593.

It is an arithmetic number, because the mean of its divisors is an integer number (198493848).

Almost surely, 2^2631321265 is an apocalyptic number.

It is an amenable number.

2631321265 is a deficient number, since it is larger than the sum of its proper divisors (544580303).

2631321265 is a wasteful number, since it uses less digits than its factorization.

2631321265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4488.

The product of its digits is 12960, while the sum is 31.

The square root of 2631321265 is about 51296.4059657204. The cubic root of 2631321265 is about 1380.5684952081.

The spelling of 2631321265 in words is "two billion, six hundred thirty-one million, three hundred twenty-one thousand, two hundred sixty-five".