343221355 has 8 divisors (see below), whose sum is σ = 413576064. Its totient is φ = 273436800.

The previous prime is 343221323. The next prime is 343221379. The reversal of 343221355 is 553122343.

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

It is not a de Polignac number, because 343221355 - 2⁵ = 343221323 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141211 + ... + 143620.

It is an arithmetic number, because the mean of its divisors is an integer number (51697008).

Almost surely, 2^343221355 is an apocalyptic number.

343221355 is a deficient number, since it is larger than the sum of its proper divisors (70354709).

343221355 is a wasteful number, since it uses less digits than its factorization.

343221355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285077.

The product of its digits is 10800, while the sum is 28.

The square root of 343221355 is about 18526.2342368869. The cubic root of 343221355 is about 700.1505492517.

Adding to 343221355 its reverse (553122343), we get a palindrome (896343698).

The spelling of 343221355 in words is "three hundred forty-three million, two hundred twenty-one thousand, three hundred fifty-five".