52317721 has 8 divisors (see below), whose sum is σ = 56574720. Its totient is φ = 48191808.

The previous prime is 52317703. The next prime is 52317737. The reversal of 52317721 is 12771325.

52317721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 52317721 - 2⁵ = 52317689 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 52317721.

It is not an unprimeable number, because it can be changed into a prime (52317701) 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, 31941 + ... + 33538.

It is an arithmetic number, because the mean of its divisors is an integer number (7071840).

Almost surely, 2^52317721 is an apocalyptic number.

It is an amenable number.

52317721 is a deficient number, since it is larger than the sum of its proper divisors (4256999).

52317721 is a wasteful number, since it uses less digits than its factorization.

52317721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65543.

The product of its digits is 2940, while the sum is 28.

The square root of 52317721 is about 7233.0989900595. The cubic root of 52317721 is about 374.0097631546.

The spelling of 52317721 in words is "fifty-two million, three hundred seventeen thousand, seven hundred twenty-one".