52522121 has 4 divisors (see below), whose sum is σ = 53042244. Its totient is φ = 52002000.

The previous prime is 52522111. The next prime is 52522139. The reversal of 52522121 is 12122525.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 23145721 + 29376400 = 4811^2 + 5420^2 .

It is a cyclic number.

It is not a de Polignac number, because 52522121 - 2¹⁰ = 52521097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 52522093 and 52522102.

It is not an unprimeable number, because it can be changed into a prime (52522111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 259910 + ... + 260111.

It is an arithmetic number, because the mean of its divisors is an integer number (13260561).

Almost surely, 2^52522121 is an apocalyptic number.

It is an amenable number.

52522121 is a deficient number, since it is larger than the sum of its proper divisors (520123).

52522121 is a wasteful number, since it uses less digits than its factorization.

52522121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520122.

The product of its digits is 400, while the sum is 20.

The square root of 52522121 is about 7247.2147063544. The cubic root of 52522121 is about 374.4962028797.

Adding to 52522121 its reverse (12122525), we get a palindrome (64644646).

The spelling of 52522121 in words is "fifty-two million, five hundred twenty-two thousand, one hundred twenty-one".