181040105 has 8 divisors (see below), whose sum is σ = 222300672. Its totient is φ = 141463728.

The previous prime is 181040087. The next prime is 181040129. The reversal of 181040105 is 501040181.

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

It is a cyclic number.

It is not a de Polignac number, because 181040105 - 2¹⁶ = 180974569 is a prime.

It is a super-2 number, since 2×181040105² = 65551039236822050, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 420809 + ... + 421238.

It is an arithmetic number, because the mean of its divisors is an integer number (27787584).

Almost surely, 2^181040105 is an apocalyptic number.

It is an amenable number.

181040105 is a deficient number, since it is larger than the sum of its proper divisors (41260567).

181040105 is an equidigital number, since it uses as much as digits as its factorization.

181040105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 842095.

The product of its (nonzero) digits is 160, while the sum is 20.

The square root of 181040105 is about 13455.1144551059. The cubic root of 181040105 is about 565.7070585138.

Adding to 181040105 its reverse (501040181), we get a palindrome (682080286).

The spelling of 181040105 in words is "one hundred eighty-one million, forty thousand, one hundred five".