231235171 has 2 divisors, whose sum is σ = 231235172. Its totient is φ = 231235170.

The previous prime is 231235141. The next prime is 231235229. The reversal of 231235171 is 171532132.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231235171 is a prime.

It is not a weakly prime, because it can be changed into another prime (231235141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115617585 + 115617586.

It is an arithmetic number, because the mean of its divisors is an integer number (115617586).

Almost surely, 2^231235171 is an apocalyptic number.

231235171 is a deficient number, since it is larger than the sum of its proper divisors (1).

231235171 is an equidigital number, since it uses as much as digits as its factorization.

231235171 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1260, while the sum is 25.

The square root of 231235171 is about 15206.4187434123. The cubic root of 231235171 is about 613.7873927467.

The spelling of 231235171 in words is "two hundred thirty-one million, two hundred thirty-five thousand, one hundred seventy-one".