171115427 has 16 divisors (see below), whose sum is σ = 201180672. Its totient is φ = 142486080.

The previous prime is 171115403. The next prime is 171115453. The reversal of 171115427 is 724511171.

It is a cyclic number.

It is not a de Polignac number, because 171115427 - 2⁸ = 171115171 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 171115427.

It is not an unprimeable number, because it can be changed into a prime (171115127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74348 + ... + 76614.

It is an arithmetic number, because the mean of its divisors is an integer number (12573792).

Almost surely, 2^171115427 is an apocalyptic number.

171115427 is a deficient number, since it is larger than the sum of its proper divisors (30065245).

171115427 is a wasteful number, since it uses less digits than its factorization.

171115427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2578.

The product of its digits is 1960, while the sum is 29.

The square root of 171115427 is about 13081.1095477410. The cubic root of 171115427 is about 555.1747705951.

Adding to 171115427 its reverse (724511171), we get a palindrome (895626598).

The spelling of 171115427 in words is "one hundred seventy-one million, one hundred fifteen thousand, four hundred twenty-seven".