352046221 has 2 divisors, whose sum is σ = 352046222. Its totient is φ = 352046220.

The previous prime is 352046209. The next prime is 352046249. The reversal of 352046221 is 122640253.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 348755625 + 3290596 = 18675^2 + 1814^2 .

It is an emirp because it is prime and its reverse (122640253) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 352046221 - 2⁹ = 352045709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (352046021) 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, 176023110 + 176023111.

It is an arithmetic number, because the mean of its divisors is an integer number (176023111).

Almost surely, 2^352046221 is an apocalyptic number.

It is an amenable number.

352046221 is a deficient number, since it is larger than the sum of its proper divisors (1).

352046221 is an equidigital number, since it uses as much as digits as its factorization.

352046221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 352046221 is about 18762.8947926486. The cubic root of 352046221 is about 706.1005703017.

Adding to 352046221 its reverse (122640253), we get a palindrome (474686474).

The spelling of 352046221 in words is "three hundred fifty-two million, forty-six thousand, two hundred twenty-one".