343243213 has 2 divisors, whose sum is σ = 343243214. Its totient is φ = 343243212.

The previous prime is 343243183. The next prime is 343243223. The reversal of 343243213 is 312342343.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 338633604 + 4609609 = 18402^2 + 2147^2 .

It is a cyclic number.

It is not a de Polignac number, because 343243213 - 2⁹ = 343242701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (343243223) 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, 171621606 + 171621607.

It is an arithmetic number, because the mean of its divisors is an integer number (171621607).

Almost surely, 2^343243213 is an apocalyptic number.

It is an amenable number.

343243213 is a deficient number, since it is larger than the sum of its proper divisors (1).

343243213 is an equidigital number, since it uses as much as digits as its factorization.

343243213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 25.

The square root of 343243213 is about 18526.8241477054. The cubic root of 343243213 is about 700.1654119300.

Adding to 343243213 its reverse (312342343), we get a palindrome (655585556).

The spelling of 343243213 in words is "three hundred forty-three million, two hundred forty-three thousand, two hundred thirteen".