52412221 has 2 divisors, whose sum is σ = 52412222. Its totient is φ = 52412220.

The previous prime is 52412179. The next prime is 52412249. The reversal of 52412221 is 12221425.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47416996 + 4995225 = 6886^2 + 2235^2 .

It is a cyclic number.

It is not a de Polignac number, because 52412221 - 2¹⁹ = 51887933 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52412281) 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 as a sum of consecutive naturals, namely, 26206110 + 26206111.

It is an arithmetic number, because the mean of its divisors is an integer number (26206111).

Almost surely, 2^52412221 is an apocalyptic number.

It is an amenable number.

52412221 is a deficient number, since it is larger than the sum of its proper divisors (1).

52412221 is an equidigital number, since it uses as much as digits as its factorization.

52412221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 320, while the sum is 19.

The square root of 52412221 is about 7239.6285125689. The cubic root of 52412221 is about 374.2348154125.

Adding to 52412221 its reverse (12221425), we get a palindrome (64633646).

The spelling of 52412221 in words is "fifty-two million, four hundred twelve thousand, two hundred twenty-one".