52513021 has 16 divisors (see below), whose sum is σ = 58605120. Its totient is φ = 46654720.

The previous prime is 52513007. The next prime is 52513033. The reversal of 52513021 is 12031525.

52513021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 52513021 - 2⁵ = 52512989 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 52513021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52513001) 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 15 ways as a sum of consecutive naturals, for example, 102915 + ... + 103423.

It is an arithmetic number, because the mean of its divisors is an integer number (3662820).

Almost surely, 2^52513021 is an apocalyptic number.

It is an amenable number.

52513021 is a deficient number, since it is larger than the sum of its proper divisors (6092099).

52513021 is a wasteful number, since it uses less digits than its factorization.

52513021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 716.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 52513021 is about 7246.5868517530. The cubic root of 52513021 is about 374.4745731853.

Adding to 52513021 its reverse (12031525), we get a palindrome (64544546).

The spelling of 52513021 in words is "fifty-two million, five hundred thirteen thousand, twenty-one".