2431681 has 8 divisors (see below), whose sum is σ = 2805440. Its totient is φ = 2064528.

The previous prime is 2431673. The next prime is 2431691. The reversal of 2431681 is 1861342.

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 2431681 - 2³ = 2431673 is a prime.

It is a super-2 number, since 2×2431681² = 11826144971522, which contains 22 as substring.

It is a Duffinian number.

2431681 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2431661) 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, 831 + ... + 2356.

It is an arithmetic number, because the mean of its divisors is an integer number (350680).

2^2431681 is an apocalyptic number.

It is an amenable number.

2431681 is a deficient number, since it is larger than the sum of its proper divisors (373759).

2431681 is a wasteful number, since it uses less digits than its factorization.

2431681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3303.

The product of its digits is 1152, while the sum is 25.

The square root of 2431681 is about 1559.3848145984. The cubic root of 2431681 is about 134.4731362443.

The spelling of 2431681 in words is "two million, four hundred thirty-one thousand, six hundred eighty-one".