52521321 has 8 divisors (see below), whose sum is σ = 70872480. Its totient is φ = 34592192.

The previous prime is 52521319. The next prime is 52521353. The reversal of 52521321 is 12312525.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 52521321 - 2¹ = 52521319 is a prime.

It is not an unprimeable number, because it can be changed into a prime (52521311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105216 + ... + 105713.

It is an arithmetic number, because the mean of its divisors is an integer number (8859060).

Almost surely, 2^52521321 is an apocalyptic number.

It is an amenable number.

52521321 is a deficient number, since it is larger than the sum of its proper divisors (18351159).

52521321 is a wasteful number, since it uses less digits than its factorization.

52521321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211015.

The product of its digits is 600, while the sum is 21.

The square root of 52521321 is about 7247.1595125263. The cubic root of 52521321 is about 374.4943014683.

Adding to 52521321 its reverse (12312525), we get a palindrome (64833846).

The spelling of 52521321 in words is "fifty-two million, five hundred twenty-one thousand, three hundred twenty-one".