343894221 has 24 divisors (see below), whose sum is σ = 560004480. Its totient is φ = 208418760.

The previous prime is 343894219. The next prime is 343894223. The reversal of 343894221 is 122498343.

343894221 is a `hidden beast` number, since 343 + 8 + 94 + 221 = 666.

It is an interprime number because it is at equal distance from previous prime (343894219) and next prime (343894223).

It is not a de Polignac number, because 343894221 - 2¹ = 343894219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (343894223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 49365 + ... + 55898.

It is an arithmetic number, because the mean of its divisors is an integer number (23333520).

Almost surely, 2^343894221 is an apocalyptic number.

It is an amenable number.

343894221 is a deficient number, since it is larger than the sum of its proper divisors (216110259).

343894221 is a wasteful number, since it uses less digits than its factorization.

343894221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105294 (or 105277 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 343894221 is about 18544.3851610130. The cubic root of 343894221 is about 700.6077857334.

The spelling of 343894221 in words is "three hundred forty-three million, eight hundred ninety-four thousand, two hundred twenty-one".