2585824421 has 4 divisors (see below), whose sum is σ = 2669238144. Its totient is φ = 2502410700.

The previous prime is 2585824403. The next prime is 2585824429. The reversal of 2585824421 is 1244285852.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2585824421 - 2⁶ = 2585824357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2585824429) 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, 41706815 + ... + 41706876.

It is an arithmetic number, because the mean of its divisors is an integer number (667309536).

Almost surely, 2^2585824421 is an apocalyptic number.

It is an amenable number.

2585824421 is a deficient number, since it is larger than the sum of its proper divisors (83413723).

2585824421 is an equidigital number, since it uses as much as digits as its factorization.

2585824421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83413722.

The product of its digits is 204800, while the sum is 41.

The square root of 2585824421 is about 50851.0021631826. The cubic root of 2585824421 is about 1372.5652862819.

The spelling of 2585824421 in words is "two billion, five hundred eighty-five million, eight hundred twenty-four thousand, four hundred twenty-one".