171663242 has 8 divisors (see below), whose sum is σ = 257920896. Its totient is φ = 85689612.

The previous prime is 171663221. The next prime is 171663257. The reversal of 171663242 is 242366171.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 171663199 and 171663208.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69488 + ... + 71915.

It is an arithmetic number, because the mean of its divisors is an integer number (32240112).

Almost surely, 2^171663242 is an apocalyptic number.

171663242 is a deficient number, since it is larger than the sum of its proper divisors (86257654).

171663242 is a wasteful number, since it uses less digits than its factorization.

171663242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142012.

The product of its digits is 12096, while the sum is 32.

The square root of 171663242 is about 13102.0319798114. The cubic root of 171663242 is about 555.7665915551.

The spelling of 171663242 in words is "one hundred seventy-one million, six hundred sixty-three thousand, two hundred forty-two".