2001213445 has 16 divisors (see below), whose sum is σ = 2994023808. Its totient is φ = 1247509440.

The previous prime is 2001213443. The next prime is 2001213479. The reversal of 2001213445 is 5443121002.

2001213445 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2001213445 - 2¹ = 2001213443 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001213443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2598594 + ... + 2599363.

It is an arithmetic number, because the mean of its divisors is an integer number (187126488).

Almost surely, 2^2001213445 is an apocalyptic number.

It is an amenable number.

2001213445 is a deficient number, since it is larger than the sum of its proper divisors (992810363).

2001213445 is a wasteful number, since it uses less digits than its factorization.

2001213445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5197980.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 2001213445 is about 44734.9242203449. The cubic root of 2001213445 is about 1260.1758058628.

Adding to 2001213445 its reverse (5443121002), we get a palindrome (7444334447).

The spelling of 2001213445 in words is "two billion, one million, two hundred thirteen thousand, four hundred forty-five".