2001232431 has 36 divisors (see below), whose sum is σ = 3263286936. Its totient is φ = 1180064160.

The previous prime is 2001232421. The next prime is 2001232433. The reversal of 2001232431 is 1342321002.

2001232431 is a `hidden beast` number, since 2 + 0 + 0 + 1 + 232 + 431 = 666.

2001232431 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2001232431 - 2⁹ = 2001231919 is a prime.

It is a super-2 number, since 2×2001232431² = 8009862485772339522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001232433) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 15460 + ... + 65126.

Almost surely, 2^2001232431 is an apocalyptic number.

2001232431 is a deficient number, since it is larger than the sum of its proper divisors (1262054505).

2001232431 is a wasteful number, since it uses less digits than its factorization.

2001232431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49732 (or 49718 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 2001232431 is about 44735.1364254095. The cubic root of 2001232431 is about 1260.1797910486.

Adding to 2001232431 its reverse (1342321002), we get a palindrome (3343553433).

It can be divided in two parts, 2001 and 232431, that added together give a palindrome (234432).

The spelling of 2001232431 in words is "two billion, one million, two hundred thirty-two thousand, four hundred thirty-one".