343344521 has 4 divisors (see below), whose sum is σ = 369755652. Its totient is φ = 316933392.

The previous prime is 343344517. The next prime is 343344553. The reversal of 343344521 is 125443343.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22934521 + 320410000 = 4789^2 + 17900^2 .

It is a cyclic number.

It is not a de Polignac number, because 343344521 - 2² = 343344517 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (343344721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13205546 + ... + 13205571.

It is an arithmetic number, because the mean of its divisors is an integer number (92438913).

Almost surely, 2^343344521 is an apocalyptic number.

It is an amenable number.

343344521 is a deficient number, since it is larger than the sum of its proper divisors (26411131).

343344521 is a wasteful number, since it uses less digits than its factorization.

343344521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26411130.

The product of its digits is 17280, while the sum is 29.

The square root of 343344521 is about 18529.5580357439. The cubic root of 343344521 is about 700.2342896019.

Adding to 343344521 its reverse (125443343), we get a palindrome (468787864).

The spelling of 343344521 in words is "three hundred forty-three million, three hundred forty-four thousand, five hundred twenty-one".