343321213 has 4 divisors (see below), whose sum is σ = 343420668. Its totient is φ = 343221760.

The previous prime is 343321201. The next prime is 343321247. The reversal of 343321213 is 312123343.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 312123343 = 7 ⋅44589049.

It can be written as a sum of positive squares in 2 ways, for example, as 262375204 + 80946009 = 16198^2 + 8997^2 .

It is a cyclic number.

It is not a de Polignac number, because 343321213 - 2²⁵ = 309766781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (343321313) 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 in 3 ways as a sum of consecutive naturals, for example, 44356 + ... + 51517.

It is an arithmetic number, because the mean of its divisors is an integer number (85855167).

Almost surely, 2^343321213 is an apocalyptic number.

It is an amenable number.

343321213 is a deficient number, since it is larger than the sum of its proper divisors (99455).

343321213 is an equidigital number, since it uses as much as digits as its factorization.

343321213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99454.

The product of its digits is 1296, while the sum is 22.

The square root of 343321213 is about 18528.9290840027. The cubic root of 343321213 is about 700.2184440695.

Adding to 343321213 its reverse (312123343), we get a palindrome (655444556).

The spelling of 343321213 in words is "three hundred forty-three million, three hundred twenty-one thousand, two hundred thirteen".