352205221 has 2 divisors, whose sum is σ = 352205222. Its totient is φ = 352205220.

The previous prime is 352205219. The next prime is 352205239. The reversal of 352205221 is 122502253.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 342657121 + 9548100 = 18511^2 + 3090^2 .

It is a cyclic number.

It is not a de Polignac number, because 352205221 - 2¹ = 352205219 is a prime.

Together with 352205219, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 352205192 and 352205201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (352205251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 176102610 + 176102611.

It is an arithmetic number, because the mean of its divisors is an integer number (176102611).

Almost surely, 2^352205221 is an apocalyptic number.

It is an amenable number.

352205221 is a deficient number, since it is larger than the sum of its proper divisors (1).

352205221 is an equidigital number, since it uses as much as digits as its factorization.

352205221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 352205221 is about 18767.1314004032. The cubic root of 352205221 is about 706.2068566226.

Adding to 352205221 its reverse (122502253), we get a palindrome (474707474).

The spelling of 352205221 in words is "three hundred fifty-two million, two hundred five thousand, two hundred twenty-one".