2521265065 has 16 divisors (see below), whose sum is σ = 3310560576. Its totient is φ = 1828094400.

The previous prime is 2521265023. The next prime is 2521265077. The reversal of 2521265065 is 5605621252.

It is not a de Polignac number, because 2521265065 - 2¹⁹ = 2520740777 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2521265065.

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, 51042 + ... + 87451.

It is an arithmetic number, because the mean of its divisors is an integer number (206910036).

Almost surely, 2^2521265065 is an apocalyptic number.

It is an amenable number.

2521265065 is a deficient number, since it is larger than the sum of its proper divisors (789295511).

2521265065 is a wasteful number, since it uses less digits than its factorization.

2521265065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138840.

The product of its (nonzero) digits is 36000, while the sum is 34.

The square root of 2521265065 is about 50212.2003600719. The cubic root of 2521265065 is about 1361.0460998791.

The spelling of 2521265065 in words is "two billion, five hundred twenty-one million, two hundred sixty-five thousand, sixty-five".