343842221 has 16 divisors (see below), whose sum is σ = 393600960. Its totient is φ = 298287360.

The previous prime is 343842209. The next prime is 343842223. The reversal of 343842221 is 122248343.

It is a cyclic number.

It is not a de Polignac number, because 343842221 - 2¹⁴ = 343825837 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (343842223) 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, 2435 + ... + 26336.

It is an arithmetic number, because the mean of its divisors is an integer number (24600060).

Almost surely, 2^343842221 is an apocalyptic number.

It is an amenable number.

343842221 is a deficient number, since it is larger than the sum of its proper divisors (49758739).

343842221 is a wasteful number, since it uses less digits than its factorization.

343842221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28844.

The product of its digits is 9216, while the sum is 29.

The square root of 343842221 is about 18542.9830663785. The cubic root of 343842221 is about 700.5724711521.

The spelling of 343842221 in words is "three hundred forty-three million, eight hundred forty-two thousand, two hundred twenty-one".