343021331 has 4 divisors (see below), whose sum is σ = 346057032. Its totient is φ = 339985632.

The previous prime is 343021319. The next prime is 343021373. The reversal of 343021331 is 133120343.

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

It is a cyclic number.

It is not a de Polignac number, because 343021331 - 2¹⁴ = 343004947 is a prime.

It is a super-2 number, since 2×343021331² = 235327267042023122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (343021531) 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, 1517681 + ... + 1517906.

It is an arithmetic number, because the mean of its divisors is an integer number (86514258).

Almost surely, 2^343021331 is an apocalyptic number.

343021331 is a deficient number, since it is larger than the sum of its proper divisors (3035701).

343021331 is a wasteful number, since it uses less digits than its factorization.

343021331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3035700.

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 343021331 is about 18520.8350513685. The cubic root of 343021331 is about 700.0145105836.

Adding to 343021331 its reverse (133120343), we get a palindrome (476141674).

The spelling of 343021331 in words is "three hundred forty-three million, twenty-one thousand, three hundred thirty-one".