2001224040 has 32 divisors (see below), whose sum is σ = 6003672480. Its totient is φ = 533659712.

The previous prime is 2001224033. The next prime is 2001224047. The reversal of 2001224040 is 404221002.

It is an interprime number because it is at equal distance from previous prime (2001224033) and next prime (2001224047).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (2001224047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8338314 + ... + 8338553.

It is an arithmetic number, because the mean of its divisors is an integer number (187614765).

Almost surely, 2^2001224040 is an apocalyptic number.

2001224040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001224040 is an abundant number, since it is smaller than the sum of its proper divisors (4002448440).

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

2001224040 is a wasteful number, since it uses less digits than its factorization.

2001224040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16676881 (or 16676877 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 2001224040 is about 44735.0426399707. The cubic root of 2001224040 is about 1260.1780297700.

Adding to 2001224040 its reverse (404221002), we get a palindrome (2405445042).

The spelling of 2001224040 in words is "two billion, one million, two hundred twenty-four thousand, forty".