2556515523 has 8 divisors (see below), whose sum is σ = 3410991808. Its totient is φ = 1703191464.

The previous prime is 2556515519. The next prime is 2556515587. The reversal of 2556515523 is 3255156552.

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

It is not a de Polignac number, because 2556515523 - 2² = 2556515519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2556515023) 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, 282865 + ... + 291762.

It is an arithmetic number, because the mean of its divisors is an integer number (426373976).

Almost surely, 2^2556515523 is an apocalyptic number.

2556515523 is a deficient number, since it is larger than the sum of its proper divisors (854476285).

2556515523 is a wasteful number, since it uses less digits than its factorization.

2556515523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576113.

The product of its digits is 225000, while the sum is 39.

The square root of 2556515523 is about 50561.9968256793. The cubic root of 2556515523 is about 1367.3598117931.

The spelling of 2556515523 in words is "two billion, five hundred fifty-six million, five hundred fifteen thousand, five hundred twenty-three".