343112221 has 4 divisors (see below), whose sum is σ = 343346944. Its totient is φ = 342877500.

The previous prime is 343112201. The next prime is 343112227. The reversal of 343112221 is 122211343.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 122211343 = 431 ⋅283553.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-343112221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (343112227) 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, 115155 + ... + 118096.

It is an arithmetic number, because the mean of its divisors is an integer number (85836736).

Almost surely, 2^343112221 is an apocalyptic number.

It is an amenable number.

343112221 is a deficient number, since it is larger than the sum of its proper divisors (234723).

343112221 is a wasteful number, since it uses less digits than its factorization.

343112221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234722.

The product of its digits is 288, while the sum is 19.

The square root of 343112221 is about 18523.2886119069. The cubic root of 343112221 is about 700.0763324922.

Adding to 343112221 its reverse (122211343), we get a palindrome (465323564).

The spelling of 343112221 in words is "three hundred forty-three million, one hundred twelve thousand, two hundred twenty-one".