52320561 has 8 divisors (see below), whose sum is σ = 72793920. Its totient is φ = 33363792.

The previous prime is 52320557. The next prime is 52320589. The reversal of 52320561 is 16502325.

52320561 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 not a de Polignac number, because 52320561 - 2² = 52320557 is a prime.

It is a super-2 number, since 2×52320561² = 5474882206709442, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (52320061) 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, 379066 + ... + 379203.

It is an arithmetic number, because the mean of its divisors is an integer number (9099240).

Almost surely, 2^52320561 is an apocalyptic number.

It is an amenable number.

52320561 is a deficient number, since it is larger than the sum of its proper divisors (20473359).

52320561 is a wasteful number, since it uses less digits than its factorization.

52320561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 758295.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 52320561 is about 7233.2953071197. The cubic root of 52320561 is about 374.0165305780.

Adding to 52320561 its reverse (16502325), we get a palindrome (68822886).

The spelling of 52320561 in words is "fifty-two million, three hundred twenty thousand, five hundred sixty-one".