171157211 has 2 divisors, whose sum is σ = 171157212. Its totient is φ = 171157210.

The previous prime is 171157163. The next prime is 171157223. The reversal of 171157211 is 112751171.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-171157211 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (171357211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85578605 + 85578606.

It is an arithmetic number, because the mean of its divisors is an integer number (85578606).

Almost surely, 2^171157211 is an apocalyptic number.

171157211 is a deficient number, since it is larger than the sum of its proper divisors (1).

171157211 is an equidigital number, since it uses as much as digits as its factorization.

171157211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 490, while the sum is 26.

The square root of 171157211 is about 13082.7065624816. The cubic root of 171157211 is about 555.2199555620.

The spelling of 171157211 in words is "one hundred seventy-one million, one hundred fifty-seven thousand, two hundred eleven".