2521543684 has 36 divisors (see below), whose sum is σ = 4873509424. Its totient is φ = 1140678000.

The previous prime is 2521543669. The next prime is 2521543697. The reversal of 2521543684 is 4863451252.

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 11 ways as a sum of consecutive naturals, for example, 89779 + ... + 114469.

Almost surely, 2^2521543684 is an apocalyptic number.

It is an amenable number.

2521543684 is a deficient number, since it is larger than the sum of its proper divisors (2351965740).

2521543684 is a wasteful number, since it uses less digits than its factorization.

2521543684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24928 (or 24915 counting only the distinct ones).

The product of its digits is 230400, while the sum is 40.

The square root of 2521543684 is about 50214.9746987888. The cubic root of 2521543684 is about 1361.0962333539.

The spelling of 2521543684 in words is "two billion, five hundred twenty-one million, five hundred forty-three thousand, six hundred eighty-four".