171601231 has 2 divisors, whose sum is σ = 171601232. Its totient is φ = 171601230.

The previous prime is 171601211. The next prime is 171601259. The reversal of 171601231 is 132106171.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 171601231 - 2¹³ = 171593039 is a prime.

It is a super-2 number, since 2×171601231² = 58893964961430722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (171601201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85800615 + 85800616.

It is an arithmetic number, because the mean of its divisors is an integer number (85800616).

Almost surely, 2^171601231 is an apocalyptic number.

171601231 is a deficient number, since it is larger than the sum of its proper divisors (1).

171601231 is an equidigital number, since it uses as much as digits as its factorization.

171601231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 171601231 is about 13099.6653010678. The cubic root of 171601231 is about 555.6996624669.

The spelling of 171601231 in words is "one hundred seventy-one million, six hundred one thousand, two hundred thirty-one".