171315223 has 2 divisors, whose sum is σ = 171315224. Its totient is φ = 171315222.

The previous prime is 171315187. The next prime is 171315251. The reversal of 171315223 is 322513171.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-171315223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (171315323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85657611 + 85657612.

It is an arithmetic number, because the mean of its divisors is an integer number (85657612).

Almost surely, 2^171315223 is an apocalyptic number.

171315223 is a deficient number, since it is larger than the sum of its proper divisors (1).

171315223 is an equidigital number, since it uses as much as digits as its factorization.

171315223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1260, while the sum is 25.

The square root of 171315223 is about 13088.7441337968. The cubic root of 171315223 is about 555.3907623330.

Adding to 171315223 its reverse (322513171), we get a palindrome (493828394).

The spelling of 171315223 in words is "one hundred seventy-one million, three hundred fifteen thousand, two hundred twenty-three".