2001334451 has 4 divisors (see below), whose sum is σ = 2001902232. Its totient is φ = 2000766672.

The previous prime is 2001334441. The next prime is 2001334471. The reversal of 2001334451 is 1544331002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1544331002 = 2 ⋅772165501.

It is a cyclic number.

It is not a de Polignac number, because 2001334451 - 2¹⁰ = 2001333427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001334441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 278570 + ... + 285663.

It is an arithmetic number, because the mean of its divisors is an integer number (500475558).

Almost surely, 2^2001334451 is an apocalyptic number.

2001334451 is a deficient number, since it is larger than the sum of its proper divisors (567781).

2001334451 is an equidigital number, since it uses as much as digits as its factorization.

2001334451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 567780.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 2001334451 is about 44736.2766778819. The cubic root of 2001334451 is about 1260.2012047461.

Adding to 2001334451 its reverse (1544331002), we get a palindrome (3545665453).

The spelling of 2001334451 in words is "two billion, one million, three hundred thirty-four thousand, four hundred fifty-one".