2115002521 has 8 divisors (see below), whose sum is σ = 2241626184. Its totient is φ = 1988624640.

The previous prime is 2115002503. The next prime is 2115002531. The reversal of 2115002521 is 1252005112.

It can be written as a sum of positive squares in 4 ways, for example, as 1225770121 + 889232400 = 35011^2 + 29820^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2115002521 - 2¹¹ = 2115000473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2115002531) 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, 43570 + ... + 78283.

It is an arithmetic number, because the mean of its divisors is an integer number (280203273).

Almost surely, 2^2115002521 is an apocalyptic number.

It is an amenable number.

2115002521 is a deficient number, since it is larger than the sum of its proper divisors (126623663).

2115002521 is a wasteful number, since it uses less digits than its factorization.

2115002521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122891.

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 2115002521 is about 45989.1565589107. The cubic root of 2115002521 is about 1283.6214421604.

Adding to 2115002521 its reverse (1252005112), we get a palindrome (3367007633).

The spelling of 2115002521 in words is "two billion, one hundred fifteen million, two thousand, five hundred twenty-one".