2001244505 has 16 divisors (see below), whose sum is σ = 2738355984. Its totient is φ = 1390909440.

The previous prime is 2001244501. The next prime is 2001244517. The reversal of 2001244505 is 5054421002.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 292681 + 2000951824 = 541^2 + 44732^2 .

It is not a de Polignac number, because 2001244505 - 2² = 2001244501 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2001244501) 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, 904436 + ... + 906645.

It is an arithmetic number, because the mean of its divisors is an integer number (171147249).

Almost surely, 2^2001244505 is an apocalyptic number.

It is an amenable number.

2001244505 is a deficient number, since it is larger than the sum of its proper divisors (737111479).

2001244505 is a wasteful number, since it uses less digits than its factorization.

2001244505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1811116.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 2001244505 is about 44735.2713750571. The cubic root of 2001244505 is about 1260.1823253836.

Adding to 2001244505 its reverse (5054421002), we get a palindrome (7055665507).

The spelling of 2001244505 in words is "two billion, one million, two hundred forty-four thousand, five hundred five".