231643343 has 4 divisors (see below), whose sum is σ = 245269440. Its totient is φ = 218017248.

The previous prime is 231643339. The next prime is 231643351. The reversal of 231643343 is 343346132.

It is a happy number.

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

It is not a de Polignac number, because 231643343 - 2² = 231643339 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231643303) 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, 6813023 + ... + 6813056.

It is an arithmetic number, because the mean of its divisors is an integer number (61317360).

Almost surely, 2^231643343 is an apocalyptic number.

231643343 is a deficient number, since it is larger than the sum of its proper divisors (13626097).

231643343 is a wasteful number, since it uses less digits than its factorization.

231643343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13626096.

The product of its digits is 15552, while the sum is 29.

The square root of 231643343 is about 15219.8338690013. The cubic root of 231643343 is about 614.1483291334.

Adding to 231643343 its reverse (343346132), we get a palindrome (574989475).

The spelling of 231643343 in words is "two hundred thirty-one million, six hundred forty-three thousand, three hundred forty-three".