52637521 has 4 divisors (see below), whose sum is σ = 53271792. Its totient is φ = 52003252.

The previous prime is 52637513. The next prime is 52637527. The reversal of 52637521 is 12573625.

52637521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 52637521 - 2³ = 52637513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52637527) 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 3 ways as a sum of consecutive naturals, for example, 317011 + ... + 317176.

It is an arithmetic number, because the mean of its divisors is an integer number (13317948).

Almost surely, 2^52637521 is an apocalyptic number.

It is an amenable number.

52637521 is a deficient number, since it is larger than the sum of its proper divisors (634271).

52637521 is an equidigital number, since it uses as much as digits as its factorization.

52637521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634270.

The product of its digits is 12600, while the sum is 31.

The square root of 52637521 is about 7255.1720172578. The cubic root of 52637521 is about 374.7702794528.

The spelling of 52637521 in words is "fifty-two million, six hundred thirty-seven thousand, five hundred twenty-one".