343312231 has 4 divisors (see below), whose sum is σ = 346711464. Its totient is φ = 339913000.

The previous prime is 343312199. The next prime is 343312243. The reversal of 343312231 is 132213343.

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 343312231 - 2⁵ = 343312199 is a prime.

It is a super-2 number, since 2×343312231² = 235726575908394722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (343312261) 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, 1699465 + ... + 1699666.

It is an arithmetic number, because the mean of its divisors is an integer number (86677866).

Almost surely, 2^343312231 is an apocalyptic number.

343312231 is a deficient number, since it is larger than the sum of its proper divisors (3399233).

343312231 is a wasteful number, since it uses less digits than its factorization.

343312231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3399232.

The product of its digits is 1296, while the sum is 22.

The square root of 343312231 is about 18528.6867046750. The cubic root of 343312231 is about 700.2123376239.

Adding to 343312231 its reverse (132213343), we get a palindrome (475525574).

The spelling of 343312231 in words is "three hundred forty-three million, three hundred twelve thousand, two hundred thirty-one".