343110221 has 2 divisors, whose sum is σ = 343110222. Its totient is φ = 343110220.

The previous prime is 343110217. The next prime is 343110233. The reversal of 343110221 is 122011343.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 249987721 + 93122500 = 15811^2 + 9650^2 .

It is a cyclic number.

It is not a de Polignac number, because 343110221 - 2² = 343110217 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 343110221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (343110211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171555110 + 171555111.

It is an arithmetic number, because the mean of its divisors is an integer number (171555111).

Almost surely, 2^343110221 is an apocalyptic number.

It is an amenable number.

343110221 is a deficient number, since it is larger than the sum of its proper divisors (1).

343110221 is an equidigital number, since it uses as much as digits as its factorization.

343110221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 343110221 is about 18523.2346257342. The cubic root of 343110221 is about 700.0749722421.

Adding to 343110221 its reverse (122011343), we get a palindrome (465121564).

The spelling of 343110221 in words is "three hundred forty-three million, one hundred ten thousand, two hundred twenty-one".