343216217 has 8 divisors (see below), whose sum is σ = 345444672. Its totient is φ = 340995600.

The previous prime is 343216193. The next prime is 343216241. The reversal of 343216217 is 712612343.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (343216193) and next prime (343216241).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-343216217 is a prime.

It is a super-2 number, since 2×343216217² = 235594743223582178, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 343216217.

It is not an unprimeable number, because it can be changed into a prime (343216267) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103292 + ... + 106562.

It is an arithmetic number, because the mean of its divisors is an integer number (43180584).

Almost surely, 2^343216217 is an apocalyptic number.

It is an amenable number.

343216217 is a deficient number, since it is larger than the sum of its proper divisors (2228455).

343216217 is a wasteful number, since it uses less digits than its factorization.

343216217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3919.

The product of its digits is 6048, while the sum is 29.

The square root of 343216217 is about 18526.0955681439. The cubic root of 343216217 is about 700.1470554991.

The spelling of 343216217 in words is "three hundred forty-three million, two hundred sixteen thousand, two hundred seventeen".