343221 has 4 divisors (see below), whose sum is σ = 457632. Its totient is φ = 228812.

The previous prime is 343219. The next prime is 343237. The reversal of 343221 is 122343.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 343221 - 2¹ = 343219 is a prime.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 343221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (343261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57201 + ... + 57206.

It is an arithmetic number, because the mean of its divisors is an integer number (114408).

2³⁴³²²¹ is an apocalyptic number.

It is an amenable number.

343221 is a deficient number, since it is larger than the sum of its proper divisors (114411).

343221 is a wasteful number, since it uses less digits than its factorization.

343221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114410.

The product of its digits is 144, while the sum is 15.

The square root of 343221 is about 585.8506635654. The cubic root of 343221 is about 70.0150307859.

Subtracting from 343221 its sum of digits (15), we obtain a triangular number (343206 = T₈₂₈).

Adding to 343221 its reverse (122343), we get a palindrome (465564).

The spelling of 343221 in words is "three hundred forty-three thousand, two hundred twenty-one", and thus it is an iban number.