5321500721 has 8 divisors (see below), whose sum is σ = 5340571680. Its totient is φ = 5302456992.

The previous prime is 5321500699. The next prime is 5321500729. The reversal of 5321500721 is 1270051235.

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

It is a cyclic number.

It is not a de Polignac number, because 5321500721 - 2¹⁰ = 5321499697 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5321500729) 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 7 ways as a sum of consecutive naturals, for example, 434741 + ... + 446813.

It is an arithmetic number, because the mean of its divisors is an integer number (667571460).

Almost surely, 2^5321500721 is an apocalyptic number.

It is an amenable number.

5321500721 is a deficient number, since it is larger than the sum of its proper divisors (19070959).

5321500721 is a wasteful number, since it uses less digits than its factorization.

5321500721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13615.

The product of its (nonzero) digits is 2100, while the sum is 26.

The square root of 5321500721 is about 72948.6169916881. The cubic root of 5321500721 is about 1745.8678803687.

Adding to 5321500721 its reverse (1270051235), we get a palindrome (6591551956).

The spelling of 5321500721 in words is "five billion, three hundred twenty-one million, five hundred thousand, seven hundred twenty-one".