2520256615 has 16 divisors (see below), whose sum is σ = 3189431520. Its totient is φ = 1906519680.

The previous prime is 2520256603. The next prime is 2520256637. The reversal of 2520256615 is 5166520252.

It is not a de Polignac number, because 2520256615 - 2²¹ = 2518159463 is a prime.

It is a congruent number.

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, 26877 + ... + 75913.

It is an arithmetic number, because the mean of its divisors is an integer number (199339470).

Almost surely, 2^2520256615 is an apocalyptic number.

2520256615 is a deficient number, since it is larger than the sum of its proper divisors (669174905).

2520256615 is a wasteful number, since it uses less digits than its factorization.

2520256615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49602.

The product of its (nonzero) digits is 36000, while the sum is 34.

The square root of 2520256615 is about 50202.1574735588. The cubic root of 2520256615 is about 1360.8646129482.

Adding to 2520256615 its reverse (5166520252), we get a palindrome (7686776867).

The spelling of 2520256615 in words is "two billion, five hundred twenty million, two hundred fifty-six thousand, six hundred fifteen".