231442443 has 6 divisors (see below), whose sum is σ = 334305764. Its totient is φ = 154294956.

The previous prime is 231442411. The next prime is 231442451. The reversal of 231442443 is 344244132.

It is a happy number.

231442443 is a `hidden beast` number, since 231 + 4 + 424 + 4 + 3 = 666.

It is not a de Polignac number, because 231442443 - 2⁵ = 231442411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231442483) 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 5 ways as a sum of consecutive naturals, for example, 12857905 + ... + 12857922.

Almost surely, 2^231442443 is an apocalyptic number.

231442443 is a deficient number, since it is larger than the sum of its proper divisors (102863321).

231442443 is a wasteful number, since it uses less digits than its factorization.

231442443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25715833 (or 25715830 counting only the distinct ones).

The product of its digits is 9216, while the sum is 27.

The square root of 231442443 is about 15213.2324967444. The cubic root of 231442443 is about 613.9707312739.

Adding to 231442443 its reverse (344244132), we get a palindrome (575686575).

The spelling of 231442443 in words is "two hundred thirty-one million, four hundred forty-two thousand, four hundred forty-three".