171822138 has 8 divisors (see below), whose sum is σ = 343644288. Its totient is φ = 57274044.

The previous prime is 171822137. The next prime is 171822143. The reversal of 171822138 is 831228171.

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

171822138 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 171822099 and 171822108.

It is not an unprimeable number, because it can be changed into a prime (171822137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14318506 + ... + 14318517.

It is an arithmetic number, because the mean of its divisors is an integer number (42955536).

Almost surely, 2^171822138 is an apocalyptic number.

171822138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

171822138 is a wasteful number, since it uses less digits than its factorization.

171822138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28637028.

The product of its digits is 5376, while the sum is 33.

The square root of 171822138 is about 13108.0943695108. The cubic root of 171822138 is about 555.9380160531.

The spelling of 171822138 in words is "one hundred seventy-one million, eight hundred twenty-two thousand, one hundred thirty-eight".