171290851 has 2 divisors, whose sum is σ = 171290852. Its totient is φ = 171290850.

The previous prime is 171290831. The next prime is 171290857. The reversal of 171290851 is 158092171.

It is a happy number.

171290851 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (158092171) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 171290851 - 2²¹ = 169193699 is a prime.

It is not a weakly prime, because it can be changed into another prime (171290857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85645425 + 85645426.

It is an arithmetic number, because the mean of its divisors is an integer number (85645426).

Almost surely, 2^171290851 is an apocalyptic number.

171290851 is a deficient number, since it is larger than the sum of its proper divisors (1).

171290851 is an equidigital number, since it uses as much as digits as its factorization.

171290851 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 34.

The square root of 171290851 is about 13087.8130717091. The cubic root of 171290851 is about 555.3644237014.

The spelling of 171290851 in words is "one hundred seventy-one million, two hundred ninety thousand, eight hundred fifty-one".