2001443355 has 24 divisors (see below), whose sum is σ = 3470463360. Its totient is φ = 1067038080.

The previous prime is 2001443329. The next prime is 2001443357. The reversal of 2001443355 is 5533441002.

It is not a de Polignac number, because 2001443355 - 2²⁰ = 2000394779 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2001443357) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 144535 + ... + 157775.

It is an arithmetic number, because the mean of its divisors is an integer number (144602640).

Almost surely, 2^2001443355 is an apocalyptic number.

2001443355 is a deficient number, since it is larger than the sum of its proper divisors (1469020005).

2001443355 is a wasteful number, since it uses less digits than its factorization.

2001443355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16611 (or 16608 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 2001443355 is about 44737.4938390608. The cubic root of 2001443355 is about 1260.2240625719.

Adding to 2001443355 its reverse (5533441002), we get a palindrome (7534884357).

The spelling of 2001443355 in words is "two billion, one million, four hundred forty-three thousand, three hundred fifty-five".