2001223443 has 8 divisors (see below), whose sum is σ = 2679950800. Its totient is φ = 1328322528.

The previous prime is 2001223439. The next prime is 2001223451. The reversal of 2001223443 is 3443221002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2001223443 - 2² = 2001223439 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001223453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1455808 + ... + 1457181.

It is an arithmetic number, because the mean of its divisors is an integer number (334993850).

Almost surely, 2^2001223443 is an apocalyptic number.

2001223443 is a deficient number, since it is larger than the sum of its proper divisors (678727357).

2001223443 is a wasteful number, since it uses less digits than its factorization.

2001223443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2913221.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 2001223443 is about 44735.0359673489. The cubic root of 2001223443 is about 1260.1779044590.

Adding to 2001223443 its reverse (3443221002), we get a palindrome (5444444445).

The spelling of 2001223443 in words is "two billion, one million, two hundred twenty-three thousand, four hundred forty-three".