343205213 has 4 divisors (see below), whose sum is σ = 369605628. Its totient is φ = 316804800.

The previous prime is 343205209. The next prime is 343205221. The reversal of 343205213 is 312502343.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 312502343 = 137 ⋅2281039.

It can be written as a sum of positive squares in 2 ways, for example, as 46607929 + 296597284 = 6827^2 + 17222^2 .

It is not a de Polignac number, because 343205213 - 2² = 343205209 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 (343205293) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13200188 + ... + 13200213.

It is an arithmetic number, because the mean of its divisors is an integer number (92401407).

Almost surely, 2^343205213 is an apocalyptic number.

It is an amenable number.

343205213 is a deficient number, since it is larger than the sum of its proper divisors (26400415).

343205213 is a wasteful number, since it uses less digits than its factorization.

343205213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26400414.

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 343205213 is about 18525.7985792786. The cubic root of 343205213 is about 700.1395728490.

Adding to 343205213 its reverse (312502343), we get a palindrome (655707556).

The spelling of 343205213 in words is "three hundred forty-three million, two hundred five thousand, two hundred thirteen".