52224020221 has 2 divisors, whose sum is σ = 52224020222. Its totient is φ = 52224020220.

The previous prime is 52224020209. The next prime is 52224020227. The reversal of 52224020221 is 12202042225.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28177315321 + 24046704900 = 167861^2 + 155070^2 .

It is a cyclic number.

It is not a de Polignac number, because 52224020221 - 2²³ = 52215631613 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 52224020192 and 52224020201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52224020227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26112010110 + 26112010111.

It is an arithmetic number, because the mean of its divisors is an integer number (26112010111).

Almost surely, 2^52224020221 is an apocalyptic number.

It is an amenable number.

52224020221 is a deficient number, since it is larger than the sum of its proper divisors (1).

52224020221 is an equidigital number, since it uses as much as digits as its factorization.

52224020221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1280, while the sum is 22.

Adding to 52224020221 its reverse (12202042225), we get a palindrome (64426062446).

The spelling of 52224020221 in words is "fifty-two billion, two hundred twenty-four million, twenty thousand, two hundred twenty-one".