2431391 has 8 divisors (see below), whose sum is σ = 2604960. Its totient is φ = 2261248.

The previous prime is 2431367. The next prime is 2431393. The reversal of 2431391 is 1931342.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2431391 - 2⁶ = 2431327 is a prime.

It is an Ulam 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 (2431393) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 710 + ... + 2316.

It is an arithmetic number, because the mean of its divisors is an integer number (325620).

2^2431391 is an apocalyptic number.

2431391 is a deficient number, since it is larger than the sum of its proper divisors (173569).

2431391 is a wasteful number, since it uses less digits than its factorization.

2431391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1713.

The product of its digits is 648, while the sum is 23.

The square root of 2431391 is about 1559.2918264392. The cubic root of 2431391 is about 134.4677903183.

The spelling of 2431391 in words is "two million, four hundred thirty-one thousand, three hundred ninety-one".