198534171 has 16 divisors (see below), whose sum is σ = 289012608. Its totient is φ = 120225600.

The previous prime is 198534121. The next prime is 198534179. The reversal of 198534171 is 171435891.

It is not a de Polignac number, because 198534171 - 2¹¹ = 198532123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (198534179) 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, 77176 + ... + 79706.

It is an arithmetic number, because the mean of its divisors is an integer number (18063288).

Almost surely, 2^198534171 is an apocalyptic number.

198534171 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

198534171 is a deficient number, since it is larger than the sum of its proper divisors (90478437).

198534171 is a wasteful number, since it uses less digits than its factorization.

198534171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4922.

The product of its digits is 30240, while the sum is 39.

The square root of 198534171 is about 14090.2154348328. The cubic root of 198534171 is about 583.3713396371.

The spelling of 198534171 in words is "one hundred ninety-eight million, five hundred thirty-four thousand, one hundred seventy-one".