2587251217 has 4 divisors (see below), whose sum is σ = 2588379876. Its totient is φ = 2586122560.

The previous prime is 2587251151. The next prime is 2587251257. The reversal of 2587251217 is 7121527852.

It is a happy number.

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 1044647041 + 1542604176 = 32321^2 + 39276^2 .

It is a cyclic number.

It is not a de Polignac number, because 2587251217 - 2⁷ = 2587251089 is a prime.

It is a Smith number, since the sum of its digits (40) 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 self number, because there is not a number n which added to its sum of digits gives 2587251217.

It is not an unprimeable number, because it can be changed into a prime (2587251257) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 560884 + ... + 565477.

It is an arithmetic number, because the mean of its divisors is an integer number (647094969).

Almost surely, 2^2587251217 is an apocalyptic number.

It is an amenable number.

2587251217 is a deficient number, since it is larger than the sum of its proper divisors (1128659).

2587251217 is a wasteful number, since it uses less digits than its factorization.

2587251217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1128658.

The product of its digits is 78400, while the sum is 40.

The square root of 2587251217 is about 50865.0294111780. The cubic root of 2587251217 is about 1372.8176894176.

The spelling of 2587251217 in words is "two billion, five hundred eighty-seven million, two hundred fifty-one thousand, two hundred seventeen".