343218 has 8 divisors (see below), whose sum is σ = 686448. Its totient is φ = 114404.

The previous prime is 343199. The next prime is 343219. The reversal of 343218 is 812343.

It is a happy number.

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

343218 is an admirable number.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 343194 and 343203.

It is not an unprimeable number, because it can be changed into a prime (343219) by changing a digit.

343218 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28596 + ... + 28607.

It is an arithmetic number, because the mean of its divisors is an integer number (85806).

2³⁴³²¹⁸ is an apocalyptic number.

343218 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

343218 is a wasteful number, since it uses less digits than its factorization.

343218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57208.

The product of its digits is 576, while the sum is 21.

The square root of 343218 is about 585.8481031803. The cubic root of 343218 is about 70.0148267913.

It can be divided in two parts, 3432 and 18, that multiplied together give a triangular number (61776 = T₃₅₁).

The spelling of 343218 in words is "three hundred forty-three thousand, two hundred eighteen".