52115621 has 8 divisors (see below), whose sum is σ = 53343360. Its totient is φ = 50892928.

The previous prime is 52115603. The next prime is 52115629. The reversal of 52115621 is 12651125.

It is a happy number.

52115621 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 a de Polignac number, because none of the positive numbers 2^k-52115621 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52115629) 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, 26645 + ... + 28533.

It is an arithmetic number, because the mean of its divisors is an integer number (6667920).

Almost surely, 2^52115621 is an apocalyptic number.

It is an amenable number.

52115621 is a deficient number, since it is larger than the sum of its proper divisors (1227739).

52115621 is a wasteful number, since it uses less digits than its factorization.

52115621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2523.

The product of its digits is 600, while the sum is 23.

The square root of 52115621 is about 7219.1149734576. The cubic root of 52115621 is about 373.5275497935.

Adding to 52115621 its reverse (12651125), we get a palindrome (64766746).

The spelling of 52115621 in words is "fifty-two million, one hundred fifteen thousand, six hundred twenty-one".