343561213 has 2 divisors, whose sum is σ = 343561214. Its totient is φ = 343561212.

The previous prime is 343561199. The next prime is 343561223. The reversal of 343561213 is 312165343.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 343101529 + 459684 = 18523^2 + 678^2 .

It is a cyclic number.

It is not a de Polignac number, because 343561213 - 2²¹ = 341464061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (343561223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171780606 + 171780607.

It is an arithmetic number, because the mean of its divisors is an integer number (171780607).

Almost surely, 2^343561213 is an apocalyptic number.

It is an amenable number.

343561213 is a deficient number, since it is larger than the sum of its proper divisors (1).

343561213 is an equidigital number, since it uses as much as digits as its factorization.

343561213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 28.

The square root of 343561213 is about 18535.4043117489. The cubic root of 343561213 is about 700.3815695199.

The spelling of 343561213 in words is "three hundred forty-three million, five hundred sixty-one thousand, two hundred thirteen".