181113 has 8 divisors (see below), whose sum is σ = 245088. Its totient is φ = 118944.

The previous prime is 181087. The next prime is 181123. The reversal of 181113 is 311181.

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

It is not a de Polignac number, because 181113 - 2⁵ = 181081 is a prime.

181113 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 181092 and 181101.

It is not an unprimeable number, because it can be changed into a prime (181123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 195 + ... + 632.

It is an arithmetic number, because the mean of its divisors is an integer number (30636).

2¹⁸¹¹¹³ is an apocalyptic number.

It is an amenable number.

181113 is a deficient number, since it is larger than the sum of its proper divisors (63975).

181113 is an equidigital number, since it uses as much as digits as its factorization.

181113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 903.

The product of its digits is 24, while the sum is 15.

The square root of 181113 is about 425.5737303923. The cubic root of 181113 is about 56.5782974810.

Adding to 181113 its reverse (311181), we get a palindrome (492294).

The spelling of 181113 in words is "one hundred eighty-one thousand, one hundred thirteen".