231312142 has 8 divisors (see below), whose sum is σ = 358160832. Its totient is φ = 111925200.

The previous prime is 231312139. The next prime is 231312143. The reversal of 231312142 is 241213132.

It is a happy number.

231312142 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 (231312143) 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, 1865359 + ... + 1865482.

It is an arithmetic number, because the mean of its divisors is an integer number (44770104).

Almost surely, 2^231312142 is an apocalyptic number.

231312142 is a deficient number, since it is larger than the sum of its proper divisors (126848690).

231312142 is a wasteful number, since it uses less digits than its factorization.

231312142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3730874.

The product of its digits is 288, while the sum is 19.

The square root of 231312142 is about 15208.9494048734. The cubic root of 231312142 is about 613.8554887723.

Adding to 231312142 its reverse (241213132), we get a palindrome (472525274).

The spelling of 231312142 in words is "two hundred thirty-one million, three hundred twelve thousand, one hundred forty-two".