2431881 has 6 divisors (see below), whose sum is σ = 3512730. Its totient is φ = 1621248.

The previous prime is 2431879. The next prime is 2431909. The reversal of 2431881 is 1881342.

It can be written as a sum of positive squares in only one way, i.e., 1648656 + 783225 = 1284^2 + 885^2 .

It is not a de Polignac number, because 2431881 - 2¹ = 2431879 is a prime.

It is a super-2 number, since 2×2431881² = 11828090396322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2431811) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 135096 + ... + 135113.

It is an arithmetic number, because the mean of its divisors is an integer number (585455).

2^2431881 is an apocalyptic number.

It is an amenable number.

2431881 is a deficient number, since it is larger than the sum of its proper divisors (1080849).

2431881 is a wasteful number, since it uses less digits than its factorization.

2431881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270215 (or 270212 counting only the distinct ones).

The product of its digits is 1536, while the sum is 27.

The square root of 2431881 is about 1559.4489411327. The cubic root of 2431881 is about 134.4768228421.

The spelling of 2431881 in words is "two million, four hundred thirty-one thousand, eight hundred eighty-one".