2309857625 has 16 divisors (see below), whose sum is σ = 2884866192. Its totient is φ = 1846499200.

The previous prime is 2309857621. The next prime is 2309857637. The reversal of 2309857625 is 5267589032.

It can be written as a sum of positive squares in 8 ways, for example, as 769452121 + 1540405504 = 27739^2 + 39248^2 .

It is not a de Polignac number, because 2309857625 - 2² = 2309857621 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 2309857625.

It is not an unprimeable number, because it can be changed into a prime (2309857621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 180437 + ... + 192813.

It is an arithmetic number, because the mean of its divisors is an integer number (180304137).

Almost surely, 2^2309857625 is an apocalyptic number.

2309857625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2309857625 is a deficient number, since it is larger than the sum of its proper divisors (575008567).

2309857625 is a wasteful number, since it uses less digits than its factorization.

2309857625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13885 (or 13875 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 47.

The square root of 2309857625 is about 48060.9781943730. The cubic root of 2309857625 is about 1321.8892493066.

The spelling of 2309857625 in words is "two billion, three hundred nine million, eight hundred fifty-seven thousand, six hundred twenty-five".