231222443 has 4 divisors (see below), whose sum is σ = 232215048. Its totient is φ = 230229840.

The previous prime is 231222379. The next prime is 231222487. The reversal of 231222443 is 344222132.

231222443 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 231222443 - 2⁶ = 231222379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231228443) 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, 495953 + ... + 496418.

It is an arithmetic number, because the mean of its divisors is an integer number (58053762).

Almost surely, 2^231222443 is an apocalyptic number.

231222443 is a deficient number, since it is larger than the sum of its proper divisors (992605).

231222443 is an equidigital number, since it uses as much as digits as its factorization.

231222443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 992604.

The product of its digits is 2304, while the sum is 23.

The square root of 231222443 is about 15206.0002301723. Note that the first 3 decimals coincide. The cubic root of 231222443 is about 613.7761308652.

Adding to 231222443 its reverse (344222132), we get a palindrome (575444575).

The spelling of 231222443 in words is "two hundred thirty-one million, two hundred twenty-two thousand, four hundred forty-three".