231140023 has 2 divisors, whose sum is σ = 231140024. Its totient is φ = 231140022.

The previous prime is 231139957. The next prime is 231140027. The reversal of 231140023 is 320041132.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231140023 - 2⁹ = 231139511 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231139979 and 231140006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231140027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115570011 + 115570012.

It is an arithmetic number, because the mean of its divisors is an integer number (115570012).

Almost surely, 2^231140023 is an apocalyptic number.

231140023 is a deficient number, since it is larger than the sum of its proper divisors (1).

231140023 is an equidigital number, since it uses as much as digits as its factorization.

231140023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 231140023 is about 15203.2898742345. The cubic root of 231140023 is about 613.7031946918.

Adding to 231140023 its reverse (320041132), we get a palindrome (551181155).

The spelling of 231140023 in words is "two hundred thirty-one million, one hundred forty thousand, twenty-three".