2001103240 has 32 divisors (see below), whose sum is σ = 4657743000. Its totient is φ = 772839424.

The previous prime is 2001103219. The next prime is 2001103249. The reversal of 2001103240 is 423011002.

It can be written as a sum of positive squares in 4 ways, for example, as 1705194436 + 295908804 = 41294^2 + 17202^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2001103240.

It is not an unprimeable number, because it can be changed into a prime (2001103249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 861385 + ... + 863704.

Almost surely, 2^2001103240 is an apocalyptic number.

2001103240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001103240 is an abundant number, since it is smaller than the sum of its proper divisors (2656639760).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2001103240 is a wasteful number, since it uses less digits than its factorization.

2001103240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1725129 (or 1725125 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 2001103240 is about 44733.6924476395. The cubic root of 2001103240 is about 1260.1526731939.

Adding to 2001103240 its reverse (423011002), we get a palindrome (2424114242).

The spelling of 2001103240 in words is "two billion, one million, one hundred three thousand, two hundred forty".