2001133443 has 4 divisors (see below), whose sum is σ = 2668177928. Its totient is φ = 1334088960.

The previous prime is 2001133439. The next prime is 2001133471. The reversal of 2001133443 is 3443311002.

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

It is not a de Polignac number, because 2001133443 - 2² = 2001133439 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001133643) 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 3 ways as a sum of consecutive naturals, for example, 333522238 + ... + 333522243.

It is an arithmetic number, because the mean of its divisors is an integer number (667044482).

Almost surely, 2^2001133443 is an apocalyptic number.

2001133443 is a deficient number, since it is larger than the sum of its proper divisors (667044485).

2001133443 is an equidigital number, since it uses as much as digits as its factorization.

2001133443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 667044484.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 2001133443 is about 44734.0300330744. The cubic root of 2001133443 is about 1260.1590130633.

Adding to 2001133443 its reverse (3443311002), we get a palindrome (5444444445).

The spelling of 2001133443 in words is "two billion, one million, one hundred thirty-three thousand, four hundred forty-three".