181198134 has 80 divisors (see below), whose sum is σ = 442255968. Its totient is φ = 55116288.

The previous prime is 181198133. The next prime is 181198153. The reversal of 181198134 is 431891181.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181198133) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 203839 + ... + 204725.

Almost surely, 2^181198134 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 181198134, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (221127984).

181198134 is an abundant number, since it is smaller than the sum of its proper divisors (261057834).

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

181198134 is a wasteful number, since it uses less digits than its factorization.

181198134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1011 (or 1002 counting only the distinct ones).

The product of its digits is 6912, while the sum is 36.

The square root of 181198134 is about 13460.9856251316. The cubic root of 181198134 is about 565.8716115956.

The spelling of 181198134 in words is "one hundred eighty-one million, one hundred ninety-eight thousand, one hundred thirty-four".