171144138 has 32 divisors (see below), whose sum is σ = 386285760. Its totient is φ = 50072960.

The previous prime is 171144133. The next prime is 171144157. The reversal of 171144138 is 831441171.

It is not an unprimeable number, because it can be changed into a prime (171144131) 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, 42795 + ... + 46622.

It is an arithmetic number, because the mean of its divisors is an integer number (12071430).

Almost surely, 2^171144138 is an apocalyptic number.

171144138 is an abundant number, since it is smaller than the sum of its proper divisors (215141622).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

171144138 is a wasteful number, since it uses less digits than its factorization.

171144138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89462.

The product of its digits is 2688, while the sum is 30.

The square root of 171144138 is about 13082.2069239100. The cubic root of 171144138 is about 555.2058192887.

The spelling of 171144138 in words is "one hundred seventy-one million, one hundred forty-four thousand, one hundred thirty-eight".