231311140342 has 4 divisors (see below), whose sum is σ = 346966710516. Its totient is φ = 115655570170.

The previous prime is 231311140309. The next prime is 231311140343. The reversal of 231311140342 is 243041113132.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231311140343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57827785084 + ... + 57827785087.

It is an arithmetic number, because the mean of its divisors is an integer number (86741677629).

Almost surely, 2^231311140342 is an apocalyptic number.

231311140342 is a deficient number, since it is larger than the sum of its proper divisors (115655570174).

231311140342 is a wasteful number, since it uses less digits than its factorization.

231311140342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115655570173.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 231311140342 its reverse (243041113132), we get a palindrome (474352253474).

The spelling of 231311140342 in words is "two hundred thirty-one billion, three hundred eleven million, one hundred forty thousand, three hundred forty-two".