171125231 has 2 divisors, whose sum is σ = 171125232. Its totient is φ = 171125230.

The previous prime is 171125203. The next prime is 171125233. The reversal of 171125231 is 132521171.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 171125231 - 2¹⁰ = 171124207 is a prime.

It is a super-2 number, since 2×171125231² = 58567689369606722, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 171125233, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 171125197 and 171125206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (171125233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85562615 + 85562616.

It is an arithmetic number, because the mean of its divisors is an integer number (85562616).

Almost surely, 2^171125231 is an apocalyptic number.

171125231 is a deficient number, since it is larger than the sum of its proper divisors (1).

171125231 is an equidigital number, since it uses as much as digits as its factorization.

171125231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 420, while the sum is 23.

The square root of 171125231 is about 13081.4842812274. The cubic root of 171125231 is about 555.1853732423.

The spelling of 171125231 in words is "one hundred seventy-one million, one hundred twenty-five thousand, two hundred thirty-one".