343011021 has 4 divisors (see below), whose sum is σ = 457348032. Its totient is φ = 228674012.

The previous prime is 343011007. The next prime is 343011037. The reversal of 343011021 is 120110343.

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.

It is a cyclic number.

It is not a de Polignac number, because 343011021 - 2⁹ = 343010509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (343011041) 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 3 ways as a sum of consecutive naturals, for example, 57168501 + ... + 57168506.

It is an arithmetic number, because the mean of its divisors is an integer number (114337008).

Almost surely, 2^343011021 is an apocalyptic number.

It is an amenable number.

343011021 is a deficient number, since it is larger than the sum of its proper divisors (114337011).

343011021 is a wasteful number, since it uses less digits than its factorization.

343011021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114337010.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 343011021 is about 18520.5567140947. The cubic root of 343011021 is about 700.0074971986.

Adding to 343011021 its reverse (120110343), we get a palindrome (463121364).

The spelling of 343011021 in words is "three hundred forty-three million, eleven thousand, twenty-one".