2001144453 has 16 divisors (see below), whose sum is σ = 3326578176. Its totient is φ = 1039555440.

The previous prime is 2001144433. The next prime is 2001144491. The reversal of 2001144453 is 3544411002.

It is not a de Polignac number, because 2001144453 - 2⁵ = 2001144421 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001144403) 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, 4331251 + ... + 4331712.

It is an arithmetic number, because the mean of its divisors is an integer number (207911136).

Almost surely, 2^2001144453 is an apocalyptic number.

It is an amenable number.

2001144453 is a deficient number, since it is larger than the sum of its proper divisors (1325433723).

2001144453 is a wasteful number, since it uses less digits than its factorization.

2001144453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8662984.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 2001144453 is about 44734.1530935816. The cubic root of 2001144453 is about 1260.1613241412.

Adding to 2001144453 its reverse (3544411002), we get a palindrome (5545555455).

The spelling of 2001144453 in words is "two billion, one million, one hundred forty-four thousand, four hundred fifty-three".