343221303 has 4 divisors (see below), whose sum is σ = 457628408. Its totient is φ = 228814200.

The previous prime is 343221299. The next prime is 343221323. The reversal of 343221303 is 303122343.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 303122343 = 3 ⋅101040781.

It is not a de Polignac number, because 343221303 - 2² = 343221299 is a prime.

It is a super-4 number, since 4×343221303⁴ (a number of 35 digits) contains 4444 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 343221303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (343221323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57203548 + ... + 57203553.

It is an arithmetic number, because the mean of its divisors is an integer number (114407102).

Almost surely, 2^343221303 is an apocalyptic number.

343221303 is a deficient number, since it is larger than the sum of its proper divisors (114407105).

343221303 is a wasteful number, since it uses less digits than its factorization.

343221303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114407104.

The product of its (nonzero) digits is 1296, while the sum is 21.

The square root of 343221303 is about 18526.2328334716. The cubic root of 343221303 is about 700.1505138927.

Adding to 343221303 its reverse (303122343), we get a palindrome (646343646).

The spelling of 343221303 in words is "three hundred forty-three million, two hundred twenty-one thousand, three hundred three".