343021321 has 8 divisors (see below), whose sum is σ = 348130944. Its totient is φ = 337935120.

The previous prime is 343021319. The next prime is 343021373. The reversal of 343021321 is 123120343.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 343021321 - 2¹ = 343021319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (343051321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24831 + ... + 36091.

It is an arithmetic number, because the mean of its divisors is an integer number (43516368).

Almost surely, 2^343021321 is an apocalyptic number.

It is an amenable number.

343021321 is a deficient number, since it is larger than the sum of its proper divisors (5109623).

343021321 is a wasteful number, since it uses less digits than its factorization.

343021321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11711.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 343021321 is about 18520.8347814023. The cubic root of 343021321 is about 700.0145037811.

Adding to 343021321 its reverse (123120343), we get a palindrome (466141664).

The spelling of 343021321 in words is "three hundred forty-three million, twenty-one thousand, three hundred twenty-one".