52231321521 has 12 divisors (see below), whose sum is σ = 76571291472. Its totient is φ = 34301165976.

The previous prime is 52231321507. The next prime is 52231321609. The reversal of 52231321521 is 12512313225.

52231321521 is a `hidden beast` number, since 5 + 2 + 2 + 3 + 132 + 1 + 521 = 666.

It is not a de Polignac number, because 52231321521 - 2¹⁹ = 52230797233 is a prime.

It is a super-2 number, since 2×52231321521² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (52231321721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43308951 + ... + 43310156.

It is an arithmetic number, because the mean of its divisors is an integer number (6380940956).

Almost surely, 2^52231321521 is an apocalyptic number.

It is an amenable number.

52231321521 is a deficient number, since it is larger than the sum of its proper divisors (24339969951).

52231321521 is a wasteful number, since it uses less digits than its factorization.

52231321521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86619180 (or 86619177 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

Adding to 52231321521 its reverse (12512313225), we get a palindrome (64743634746).

The spelling of 52231321521 in words is "fifty-two billion, two hundred thirty-one million, three hundred twenty-one thousand, five hundred twenty-one".