52542021321 has 24 divisors (see below), whose sum is σ = 76120027464. Its totient is φ = 34923813120.

The previous prime is 52542021313. The next prime is 52542021373. The reversal of 52542021321 is 12312024525.

52542021321 is a `hidden beast` number, since 5 + 2 + 5 + 420 + 213 + 21 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1076561721 + 51465459600 = 32811^2 + 226860^2 .

It is not a de Polignac number, because 52542021321 - 2³ = 52542021313 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (52542022321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8700315 + ... + 8706351.

It is an arithmetic number, because the mean of its divisors is an integer number (3171667811).

Almost surely, 2^52542021321 is an apocalyptic number.

It is an amenable number.

52542021321 is a deficient number, since it is larger than the sum of its proper divisors (23578006143).

52542021321 is a wasteful number, since it uses less digits than its factorization.

52542021321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8761 (or 8758 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

Adding to 52542021321 its reverse (12312024525), we get a palindrome (64854045846).

The spelling of 52542021321 in words is "fifty-two billion, five hundred forty-two million, twenty-one thousand, three hundred twenty-one".