159515171 has 2 divisors, whose sum is σ = 159515172. Its totient is φ = 159515170.

The previous prime is 159515137. The next prime is 159515179. The reversal of 159515171 is 171515951.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-159515171 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (159515179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79757585 + 79757586.

It is an arithmetic number, because the mean of its divisors is an integer number (79757586).

Almost surely, 2^159515171 is an apocalyptic number.

159515171 is a deficient number, since it is larger than the sum of its proper divisors (1).

159515171 is an equidigital number, since it uses as much as digits as its factorization.

159515171 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7875, while the sum is 35.

The square root of 159515171 is about 12629.9315516752. The cubic root of 159515171 is about 542.3346233652.

The spelling of 159515171 in words is "one hundred fifty-nine million, five hundred fifteen thousand, one hundred seventy-one".