181442442 has 16 divisors (see below), whose sum is σ = 374591232. Its totient is φ = 58529760.

The previous prime is 181442441. The next prime is 181442447. The reversal of 181442442 is 244244181.

It is not an unprimeable number, because it can be changed into a prime (181442441) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 487563 + ... + 487934.

It is an arithmetic number, because the mean of its divisors is an integer number (23411952).

Almost surely, 2^181442442 is an apocalyptic number.

181442442 is an abundant number, since it is smaller than the sum of its proper divisors (193148790).

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

181442442 is a wasteful number, since it uses less digits than its factorization.

181442442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 975533.

The product of its digits is 8192, while the sum is 30.

The square root of 181442442 is about 13470.0572381857. The cubic root of 181442442 is about 566.1258174433.

The spelling of 181442442 in words is "one hundred eighty-one million, four hundred forty-two thousand, four hundred forty-two".