231442111 has 4 divisors (see below), whose sum is σ = 232480192. Its totient is φ = 230404032.

The previous prime is 231442109. The next prime is 231442213. The reversal of 231442111 is 111244132.

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 231442111 - 2¹ = 231442109 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 (231442411) 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, 518706 + ... + 519151.

It is an arithmetic number, because the mean of its divisors is an integer number (58120048).

Almost surely, 2^231442111 is an apocalyptic number.

231442111 is a deficient number, since it is larger than the sum of its proper divisors (1038081).

231442111 is a wasteful number, since it uses less digits than its factorization.

231442111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1038080.

The product of its digits is 192, while the sum is 19.

The square root of 231442111 is about 15213.2215851870. The cubic root of 231442111 is about 613.9704376972.

Adding to 231442111 its reverse (111244132), we get a palindrome (342686243).

The spelling of 231442111 in words is "two hundred thirty-one million, four hundred forty-two thousand, one hundred eleven".