181105131 has 32 divisors (see below), whose sum is σ = 277862400. Its totient is φ = 104163840.

The previous prime is 181105109. The next prime is 181105139. The reversal of 181105131 is 131501181.

It is a happy number.

It is not a de Polignac number, because 181105131 - 2¹⁵ = 181072363 is a prime.

It is a super-2 number, since 2×181105131² = 65598136949054322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 181105098 and 181105107.

It is not an unprimeable number, because it can be changed into a prime (181105139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27025 + ... + 33053.

It is an arithmetic number, because the mean of its divisors is an integer number (8683200).

Almost surely, 2^181105131 is an apocalyptic number.

181105131 is a deficient number, since it is larger than the sum of its proper divisors (96757269).

181105131 is a wasteful number, since it uses less digits than its factorization.

181105131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6099.

The product of its (nonzero) digits is 120, while the sum is 21.

The square root of 181105131 is about 13457.5306427294. The cubic root of 181105131 is about 565.7747806425.

The spelling of 181105131 in words is "one hundred eighty-one million, one hundred five thousand, one hundred thirty-one".