181997334 has 32 divisors (see below), whose sum is σ = 404957280. Its totient is φ = 60588000.

The previous prime is 181997327. The next prime is 181997351. The reversal of 181997334 is 433799181.

181997334 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 181997334.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53484 + ... + 56784.

It is an arithmetic number, because the mean of its divisors is an integer number (12654915).

Almost surely, 2^181997334 is an apocalyptic number.

181997334 is an abundant number, since it is smaller than the sum of its proper divisors (222959946).

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

181997334 is a wasteful number, since it uses less digits than its factorization.

181997334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4333 (or 4327 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 181997334 is about 13490.6387543363. The cubic root of 181997334 is about 566.7023436976.

The spelling of 181997334 in words is "one hundred eighty-one million, nine hundred ninety-seven thousand, three hundred thirty-four".