2431591 has 4 divisors (see below), whose sum is σ = 2437072. Its totient is φ = 2426112.

The previous prime is 2431589. The next prime is 2431633. The reversal of 2431591 is 1951342.

2431591 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1951342 = 2 ⋅975671.

It is a cyclic number.

It is not a de Polignac number, because 2431591 - 2¹ = 2431589 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 (2431501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2010 + ... + 2983.

It is an arithmetic number, because the mean of its divisors is an integer number (609268).

2^2431591 is an apocalyptic number.

2431591 is a deficient number, since it is larger than the sum of its proper divisors (5481).

2431591 is an equidigital number, since it uses as much as digits as its factorization.

2431591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5480.

The product of its digits is 1080, while the sum is 25.

The square root of 2431591 is about 1559.3559567975. The cubic root of 2431591 is about 134.4714772093.

Subtracting from 2431591 its reverse (1951342), we obtain a square (480249 = 693²).

The spelling of 2431591 in words is "two million, four hundred thirty-one thousand, five hundred ninety-one".