2001215040 has 112 divisors (see below), whose sum is σ = 6931517760. Its totient is φ = 485140480.

The previous prime is 2001214991. The next prime is 2001215057. The reversal of 2001215040 is 405121002.

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

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 84195 + ... + 105314.

Almost surely, 2^2001215040 is an apocalyptic number.

2001215040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001215040 is an abundant number, since it is smaller than the sum of its proper divisors (4930302720).

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

2001215040 is a wasteful number, since it uses less digits than its factorization.

2001215040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189540 (or 189530 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 2001215040 is about 44734.9420475762. The cubic root of 2001215040 is about 1260.1761406563.

Adding to 2001215040 its reverse (405121002), we get a palindrome (2406336042).

The spelling of 2001215040 in words is "two billion, one million, two hundred fifteen thousand, forty".