231042443 has 4 divisors (see below), whose sum is σ = 231126720. Its totient is φ = 230958168.

The previous prime is 231042433. The next prime is 231042463. The reversal of 231042443 is 344240132.

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 231042443 - 2⁸ = 231042187 is a prime.

It is a super-2 number, since 2×231042443² = 106761220934816498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231042433) 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, 37883 + ... + 43556.

It is an arithmetic number, because the mean of its divisors is an integer number (57781680).

Almost surely, 2^231042443 is an apocalyptic number.

231042443 is a deficient number, since it is larger than the sum of its proper divisors (84277).

231042443 is an equidigital number, since it uses as much as digits as its factorization.

231042443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84276.

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

The square root of 231042443 is about 15200.0803616297. The cubic root of 231042443 is about 613.6168205161.

Adding to 231042443 its reverse (344240132), we get a palindrome (575282575).

The spelling of 231042443 in words is "two hundred thirty-one million, forty-two thousand, four hundred forty-three".