52524221 has 4 divisors (see below), whose sum is σ = 52567200. Its totient is φ = 52481244.

The previous prime is 52524187. The next prime is 52524223. The reversal of 52524221 is 12242525.

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 a de Polignac number, because none of the positive numbers 2^k-52524221 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 (52524223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19601 + ... + 22118.

It is an arithmetic number, because the mean of its divisors is an integer number (13141800).

Almost surely, 2^52524221 is an apocalyptic number.

It is an amenable number.

52524221 is a deficient number, since it is larger than the sum of its proper divisors (42979).

52524221 is a wasteful number, since it uses less digits than its factorization.

52524221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42978.

The product of its digits is 1600, while the sum is 23.

The square root of 52524221 is about 7247.3595881535. The cubic root of 52524221 is about 374.5011939929.

Adding to 52524221 its reverse (12242525), we get a palindrome (64766746).

The spelling of 52524221 in words is "fifty-two million, five hundred twenty-four thousand, two hundred twenty-one".