231140140423 has 4 divisors (see below), whose sum is σ = 233260692280. Its totient is φ = 229019588568.

The previous prime is 231140140403. The next prime is 231140140447. The reversal of 231140140423 is 324041041132.

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 231140140423 - 2¹³ = 231140132231 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 (231140140403) 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, 1060275765 + ... + 1060275982.

It is an arithmetic number, because the mean of its divisors is an integer number (58315173070).

Almost surely, 2^231140140423 is an apocalyptic number.

231140140423 is a deficient number, since it is larger than the sum of its proper divisors (2120551857).

231140140423 is a wasteful number, since it uses less digits than its factorization.

231140140423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2120551856.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 231140140423 its reverse (324041041132), we get a palindrome (555181181555).

The spelling of 231140140423 in words is "two hundred thirty-one billion, one hundred forty million, one hundred forty thousand, four hundred twenty-three".