52231200221 has 2 divisors, whose sum is σ = 52231200222. Its totient is φ = 52231200220.

The previous prime is 52231200199. The next prime is 52231200223. The reversal of 52231200221 is 12200213225.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35747464900 + 16483735321 = 189070^2 + 128389^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52231200221 is a prime.

Together with 52231200223, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 52231200193 and 52231200202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52231200223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26115600110 + 26115600111.

It is an arithmetic number, because the mean of its divisors is an integer number (26115600111).

Almost surely, 2^52231200221 is an apocalyptic number.

It is an amenable number.

52231200221 is a deficient number, since it is larger than the sum of its proper divisors (1).

52231200221 is an equidigital number, since it uses as much as digits as its factorization.

52231200221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 20.

Adding to 52231200221 its reverse (12200213225), we get a palindrome (64431413446).

The spelling of 52231200221 in words is "fifty-two billion, two hundred thirty-one million, two hundred thousand, two hundred twenty-one".