231212443 has 16 divisors (see below), whose sum is σ = 291073536. Its totient is φ = 178410240.

The previous prime is 231212441. The next prime is 231212521. The reversal of 231212443 is 344212132.

It is a cyclic number.

It is not a de Polignac number, because 231212443 - 2¹ = 231212441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231212441) 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 15 ways as a sum of consecutive naturals, for example, 6646 + ... + 22507.

It is an arithmetic number, because the mean of its divisors is an integer number (18192096).

Almost surely, 2^231212443 is an apocalyptic number.

231212443 is a deficient number, since it is larger than the sum of its proper divisors (59861093).

231212443 is a wasteful number, since it uses less digits than its factorization.

231212443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29274.

The product of its digits is 1152, while the sum is 22.

The square root of 231212443 is about 15205.6714090500. The cubic root of 231212443 is about 613.7672824597.

Adding to 231212443 its reverse (344212132), we get a palindrome (575424575).

The spelling of 231212443 in words is "two hundred thirty-one million, two hundred twelve thousand, four hundred forty-three".