2520605513 has 4 divisors (see below), whose sum is σ = 2521084368. Its totient is φ = 2520126660.

The previous prime is 2520605497. The next prime is 2520605561. The reversal of 2520605513 is 3155060252.

It is a happy number.

2520605513 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 2520605513 - 2⁴ = 2520605497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2520601513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 231443 + ... + 242088.

It is an arithmetic number, because the mean of its divisors is an integer number (630271092).

Almost surely, 2^2520605513 is an apocalyptic number.

It is an amenable number.

2520605513 is a deficient number, since it is larger than the sum of its proper divisors (478855).

2520605513 is an equidigital number, since it uses as much as digits as its factorization.

2520605513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478854.

The product of its (nonzero) digits is 9000, while the sum is 29.

The square root of 2520605513 is about 50205.6322836393. The cubic root of 2520605513 is about 1360.9274082776.

Adding to 2520605513 its reverse (3155060252), we get a palindrome (5675665765).

The spelling of 2520605513 in words is "two billion, five hundred twenty million, six hundred five thousand, five hundred thirteen".