181266113 has 24 divisors (see below), whose sum is σ = 216879168. Its totient is φ = 148323168.

The previous prime is 181266097. The next prime is 181266119. The reversal of 181266113 is 311662181.

It is not a de Polignac number, because 181266113 - 2⁴ = 181266097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (181266119) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1047695 + ... + 1047867.

It is an arithmetic number, because the mean of its divisors is an integer number (9036632).

Almost surely, 2^181266113 is an apocalyptic number.

It is an amenable number.

181266113 is a deficient number, since it is larger than the sum of its proper divisors (35613055).

181266113 is an equidigital number, since it uses as much as digits as its factorization.

181266113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341 (or 282 counting only the distinct ones).

The product of its digits is 1728, while the sum is 29.

The square root of 181266113 is about 13463.5104263338. The cubic root of 181266113 is about 565.9423676163.

The spelling of 181266113 in words is "one hundred eighty-one million, two hundred sixty-six thousand, one hundred thirteen".