2139364265 has 4 divisors (see below), whose sum is σ = 2567237124. Its totient is φ = 1711491408.

The previous prime is 2139364231. The next prime is 2139364267. The reversal of 2139364265 is 5624639312.

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 1123858576 + 1015505689 = 33524^2 + 31867^2 .

It is a cyclic number.

It is not a de Polignac number, because 2139364265 - 2⁸ = 2139364009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2139364267) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 213936422 + ... + 213936431.

It is an arithmetic number, because the mean of its divisors is an integer number (641809281).

Almost surely, 2^2139364265 is an apocalyptic number.

It is an amenable number.

2139364265 is a deficient number, since it is larger than the sum of its proper divisors (427872859).

2139364265 is an equidigital number, since it uses as much as digits as its factorization.

2139364265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427872858.

The product of its digits is 233280, while the sum is 41.

The square root of 2139364265 is about 46253.2622092756. The cubic root of 2139364265 is about 1288.5311215757.

It can be divided in two parts, 21393 and 64265, that added together give a palindrome (85658).

The spelling of 2139364265 in words is "two billion, one hundred thirty-nine million, three hundred sixty-four thousand, two hundred sixty-five".