2001001515 has 32 divisors (see below), whose sum is σ = 3299498496. Its totient is φ = 1034883840.

The previous prime is 2001001489. The next prime is 2001001553. The reversal of 2001001515 is 5151001002.

It is not a de Polignac number, because 2001001515 - 2⁶ = 2001001451 is a prime.

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

It is a junction number, because it is equal to n+sod(n) for n = 2001001494 and 2001001503.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 92964 + ... + 112446.

It is an arithmetic number, because the mean of its divisors is an integer number (103109328).

Almost surely, 2^2001001515 is an apocalyptic number.

2001001515 is a deficient number, since it is larger than the sum of its proper divisors (1298496981).

2001001515 is a wasteful number, since it uses less digits than its factorization.

2001001515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19699.

The product of its (nonzero) digits is 50, while the sum is 15.

The square root of 2001001515 is about 44732.5554266688. Note that the first 3 decimals coincide. The cubic root of 2001001515 is about 1260.1313197724.

Adding to 2001001515 its reverse (5151001002), we get a palindrome (7152002517).

The spelling of 2001001515 in words is "two billion, one million, one thousand, five hundred fifteen".