52660321 has 16 divisors (see below), whose sum is σ = 61326720. Its totient is φ = 44288640.

The previous prime is 52660319. The next prime is 52660331. The reversal of 52660321 is 12306625.

It is a cyclic number.

It is not a de Polignac number, because 52660321 - 2¹ = 52660319 is a prime.

It is not an unprimeable number, because it can be changed into a prime (52660331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112530 + ... + 112996.

It is an arithmetic number, because the mean of its divisors is an integer number (3832920).

Almost surely, 2^52660321 is an apocalyptic number.

It is an amenable number.

52660321 is a deficient number, since it is larger than the sum of its proper divisors (8666399).

52660321 is a wasteful number, since it uses less digits than its factorization.

52660321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 744.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 52660321 is about 7256.7431400043. The cubic root of 52660321 is about 374.8243823613.

Adding to 52660321 its reverse (12306625), we get a palindrome (64966946).

The spelling of 52660321 in words is "fifty-two million, six hundred sixty thousand, three hundred twenty-one".