5716321521 has 4 divisors (see below), whose sum is σ = 7621762032. Its totient is φ = 3810881012.

The previous prime is 5716321517. The next prime is 5716321591. The reversal of 5716321521 is 1251236175.

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 5716321521 - 2² = 5716321517 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5716321591) 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, 952720251 + ... + 952720256.

It is an arithmetic number, because the mean of its divisors is an integer number (1905440508).

Almost surely, 2^5716321521 is an apocalyptic number.

It is an amenable number.

5716321521 is a deficient number, since it is larger than the sum of its proper divisors (1905440511).

5716321521 is a wasteful number, since it uses less digits than its factorization.

5716321521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1905440510.

The product of its digits is 12600, while the sum is 33.

The square root of 5716321521 is about 75606.3589984335. The cubic root of 5716321521 is about 1788.0193567138.

Adding to 5716321521 its reverse (1251236175), we get a palindrome (6967557696).

The spelling of 5716321521 in words is "five billion, seven hundred sixteen million, three hundred twenty-one thousand, five hundred twenty-one".