171132138 has 12 divisors (see below), whose sum is σ = 370786338. Its totient is φ = 57044040.

The previous prime is 171132113. The next prime is 171132173. The reversal of 171132138 is 831231171.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 164019249 + 7112889 = 12807^2 + 2667^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4753653 + ... + 4753688.

Almost surely, 2^171132138 is an apocalyptic number.

171132138 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

171132138 is an abundant number, since it is smaller than the sum of its proper divisors (199654200).

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

171132138 is a wasteful number, since it uses less digits than its factorization.

171132138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9507349 (or 9507346 counting only the distinct ones).

The product of its digits is 1008, while the sum is 27.

The square root of 171132138 is about 13081.7482776577. The cubic root of 171132138 is about 555.1928426527.

The spelling of 171132138 in words is "one hundred seventy-one million, one hundred thirty-two thousand, one hundred thirty-eight".