181307442 has 8 divisors (see below), whose sum is σ = 362614896. Its totient is φ = 60435812.

The previous prime is 181307429. The next prime is 181307473. The reversal of 181307442 is 244703181.

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

181307442 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15108948 + ... + 15108959.

It is an arithmetic number, because the mean of its divisors is an integer number (45326862).

Almost surely, 2^181307442 is an apocalyptic number.

181307442 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.

181307442 is a wasteful number, since it uses less digits than its factorization.

181307442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30217912.

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 181307442 is about 13465.0451911607. The cubic root of 181307442 is about 565.9853763073.

The spelling of 181307442 in words is "one hundred eighty-one million, three hundred seven thousand, four hundred forty-two".