343043221 has 8 divisors (see below), whose sum is σ = 363391704. Its totient is φ = 322713600.

The previous prime is 343043203. The next prime is 343043227. The reversal of 343043221 is 122340343.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 54552996 + 288490225 = 7386^2 + 16985^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 343043221 - 2⁹ = 343042709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 343043192 and 343043201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (343043227) 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, 53061 + ... + 59173.

It is an arithmetic number, because the mean of its divisors is an integer number (45423963).

Almost surely, 2^343043221 is an apocalyptic number.

It is an amenable number.

343043221 is a deficient number, since it is larger than the sum of its proper divisors (20348483).

343043221 is a wasteful number, since it uses less digits than its factorization.

343043221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9431.

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 343043221 is about 18521.4259980165. The cubic root of 343043221 is about 700.0294008059.

Adding to 343043221 its reverse (122340343), we get a palindrome (465383564).

The spelling of 343043221 in words is "three hundred forty-three million, forty-three thousand, two hundred twenty-one".