2521215013 has 4 divisors (see below), whose sum is σ = 2653910560. Its totient is φ = 2388519468.

The previous prime is 2521214953. The next prime is 2521215019. The reversal of 2521215013 is 3105121252.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2521215013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2521215019) 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 3 ways as a sum of consecutive naturals, for example, 66347745 + ... + 66347782.

It is an arithmetic number, because the mean of its divisors is an integer number (663477640).

Almost surely, 2^2521215013 is an apocalyptic number.

It is an amenable number.

2521215013 is a deficient number, since it is larger than the sum of its proper divisors (132695547).

2521215013 is a wasteful number, since it uses less digits than its factorization.

2521215013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132695546.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 2521215013 is about 50211.7019528317. The cubic root of 2521215013 is about 1361.0370933515.

Adding to 2521215013 its reverse (3105121252), we get a palindrome (5626336265).

The spelling of 2521215013 in words is "two billion, five hundred twenty-one million, two hundred fifteen thousand, thirteen".