2573684521 has 4 divisors (see below), whose sum is σ = 2685583872. Its totient is φ = 2461785172.

The previous prime is 2573684479. The next prime is 2573684551. The reversal of 2573684521 is 1254863752.

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-2573684521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2573684551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55949641 + ... + 55949686.

It is an arithmetic number, because the mean of its divisors is an integer number (671395968).

Almost surely, 2^2573684521 is an apocalyptic number.

It is an amenable number.

2573684521 is a deficient number, since it is larger than the sum of its proper divisors (111899351).

2573684521 is a wasteful number, since it uses less digits than its factorization.

2573684521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111899350.

The product of its digits is 403200, while the sum is 43.

The square root of 2573684521 is about 50731.4943698685. The cubic root of 2573684521 is about 1370.4139479405.

The spelling of 2573684521 in words is "two billion, five hundred seventy-three million, six hundred eighty-four thousand, five hundred twenty-one".