171155441 has 2 divisors, whose sum is σ = 171155442. Its totient is φ = 171155440.

The previous prime is 171155431. The next prime is 171155449. The reversal of 171155441 is 144551171.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 158659216 + 12496225 = 12596^2 + 3535^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-171155441 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (171155449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85577720 + 85577721.

It is an arithmetic number, because the mean of its divisors is an integer number (85577721).

Almost surely, 2^171155441 is an apocalyptic number.

It is an amenable number.

171155441 is a deficient number, since it is larger than the sum of its proper divisors (1).

171155441 is an equidigital number, since it uses as much as digits as its factorization.

171155441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2800, while the sum is 29.

The square root of 171155441 is about 13082.6389157540. The cubic root of 171155441 is about 555.2180416437.

The spelling of 171155441 in words is "one hundred seventy-one million, one hundred fifty-five thousand, four hundred forty-one".