343340221 has 16 divisors (see below), whose sum is σ = 408038400. Its totient is φ = 282695040.

The previous prime is 343340219. The next prime is 343340233. The reversal of 343340221 is 122043343.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 343340221 - 2¹ = 343340219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 343340192 and 343340201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (343340281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23955 + ... + 35503.

It is an arithmetic number, because the mean of its divisors is an integer number (25502400).

Almost surely, 2^343340221 is an apocalyptic number.

343340221 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

343340221 is a deficient number, since it is larger than the sum of its proper divisors (64698179).

343340221 is a wasteful number, since it uses less digits than its factorization.

343340221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11724.

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

The square root of 343340221 is about 18529.4420045505. The cubic root of 343340221 is about 700.2313663767.

Adding to 343340221 its reverse (122043343), we get a palindrome (465383564).

The spelling of 343340221 in words is "three hundred forty-three million, three hundred forty thousand, two hundred twenty-one".