231111142 has 8 divisors (see below), whose sum is σ = 352542600. Its totient is φ = 113596944.

The previous prime is 231111109. The next prime is 231111149. The reversal of 231111142 is 241111132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231111149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 979167 + ... + 979402.

It is an arithmetic number, because the mean of its divisors is an integer number (44067825).

Almost surely, 2^231111142 is an apocalyptic number.

231111142 is a deficient number, since it is larger than the sum of its proper divisors (121431458).

231111142 is a wasteful number, since it uses less digits than its factorization.

231111142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1958630.

The product of its digits is 48, while the sum is 16.

The square root of 231111142 is about 15202.3400172473. The cubic root of 231111142 is about 613.6776328412.

Adding to 231111142 its reverse (241111132), we get a palindrome (472222274).

The spelling of 231111142 in words is "two hundred thirty-one million, one hundred eleven thousand, one hundred forty-two".