2585304391 has 4 divisors (see below), whose sum is σ = 2596400352. Its totient is φ = 2574208432.

The previous prime is 2585304349. The next prime is 2585304413. The reversal of 2585304391 is 1934035852.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2585304391 - 2⁷ = 2585304263 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 congruent number.

It is not an unprimeable number, because it can be changed into a prime (2585308391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5547631 + ... + 5548096.

It is an arithmetic number, because the mean of its divisors is an integer number (649100088).

Almost surely, 2^2585304391 is an apocalyptic number.

2585304391 is a deficient number, since it is larger than the sum of its proper divisors (11095961).

2585304391 is a wasteful number, since it uses less digits than its factorization.

2585304391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11095960.

The product of its (nonzero) digits is 129600, while the sum is 40.

The square root of 2585304391 is about 50845.8886341856. Note that the first 3 decimals coincide. The cubic root of 2585304391 is about 1372.4732688227.

The spelling of 2585304391 in words is "two billion, five hundred eighty-five million, three hundred four thousand, three hundred ninety-one".