171140231 has 2 divisors, whose sum is σ = 171140232. Its totient is φ = 171140230.

The previous prime is 171140227. The next prime is 171140267. The reversal of 171140231 is 132041171.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 171140231 - 2² = 171140227 is a prime.

It is a super-2 number, since 2×171140231² = 58577957333466722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (171100231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85570115 + 85570116.

It is an arithmetic number, because the mean of its divisors is an integer number (85570116).

Almost surely, 2^171140231 is an apocalyptic number.

171140231 is a deficient number, since it is larger than the sum of its proper divisors (1).

171140231 is an equidigital number, since it uses as much as digits as its factorization.

171140231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 168, while the sum is 20.

The square root of 171140231 is about 13082.0575980998. The cubic root of 171140231 is about 555.2015943789.

The spelling of 171140231 in words is "one hundred seventy-one million, one hundred forty thousand, two hundred thirty-one".