2001232331 has 4 divisors (see below), whose sum is σ = 2287122672. Its totient is φ = 1715341992.

The previous prime is 2001232327. The next prime is 2001232349. The reversal of 2001232331 is 1332321002.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2001232331 - 2² = 2001232327 is a prime.

It is a super-2 number, since 2×2001232331² = 8009861685279387122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001232391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142945160 + ... + 142945173.

It is an arithmetic number, because the mean of its divisors is an integer number (571780668).

Almost surely, 2^2001232331 is an apocalyptic number.

2001232331 is a deficient number, since it is larger than the sum of its proper divisors (285890341).

2001232331 is an equidigital number, since it uses as much as digits as its factorization.

2001232331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285890340.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 2001232331 is about 44735.1353077198. The cubic root of 2001232331 is about 1260.1797700586.

Adding to 2001232331 its reverse (1332321002), we get a palindrome (3333553333).

The spelling of 2001232331 in words is "two billion, one million, two hundred thirty-two thousand, three hundred thirty-one".