52513223221 has 2 divisors, whose sum is σ = 52513223222. Its totient is φ = 52513223220.

The previous prime is 52513223183. The next prime is 52513223267. The reversal of 52513223221 is 12232231525.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39328442596 + 13184780625 = 198314^2 + 114825^2 .

It is a cyclic number.

It is not a de Polignac number, because 52513223221 - 2⁹ = 52513222709 is a prime.

It is a super-2 number, since 2×52513223221² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 52513223221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52513223291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26256611610 + 26256611611.

It is an arithmetic number, because the mean of its divisors is an integer number (26256611611).

Almost surely, 2^52513223221 is an apocalyptic number.

It is an amenable number.

52513223221 is a deficient number, since it is larger than the sum of its proper divisors (1).

52513223221 is an equidigital number, since it uses as much as digits as its factorization.

52513223221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7200, while the sum is 28.

Adding to 52513223221 its reverse (12232231525), we get a palindrome (64745454746).

The spelling of 52513223221 in words is "fifty-two billion, five hundred thirteen million, two hundred twenty-three thousand, two hundred twenty-one".