2001132231 has 32 divisors (see below), whose sum is σ = 3255091200. Its totient is φ = 1068046560.

The previous prime is 2001132209. The next prime is 2001132233. The reversal of 2001132231 is 1322311002.

It is not a de Polignac number, because 2001132231 - 2⁷ = 2001132103 is a prime.

It is a super-2 number, since 2×2001132231² = 8009060411894074722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2001132231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001132233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6991 + ... + 63648.

It is an arithmetic number, because the mean of its divisors is an integer number (101721600).

Almost surely, 2^2001132231 is an apocalyptic number.

2001132231 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2001132231 is a deficient number, since it is larger than the sum of its proper divisors (1253958969).

2001132231 is a wasteful number, since it uses less digits than its factorization.

2001132231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70739.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 2001132231 is about 44734.0164863384. The cubic root of 2001132231 is about 1260.1587586554.

Adding to 2001132231 its reverse (1322311002), we get a palindrome (3323443233).

The spelling of 2001132231 in words is "two billion, one million, one hundred thirty-two thousand, two hundred thirty-one".