180131117 has 4 divisors (see below), whose sum is σ = 180336000. Its totient is φ = 179926236.

The previous prime is 180131113. The next prime is 180131179. The reversal of 180131117 is 711131081.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 180131117 - 2² = 180131113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 180131092 and 180131101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180131113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101117 + ... + 102882.

It is an arithmetic number, because the mean of its divisors is an integer number (45084000).

Almost surely, 2^180131117 is an apocalyptic number.

It is an amenable number.

180131117 is a deficient number, since it is larger than the sum of its proper divisors (204883).

180131117 is an equidigital number, since it uses as much as digits as its factorization.

180131117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204882.

The product of its (nonzero) digits is 168, while the sum is 23.

The square root of 180131117 is about 13421.2934175511. The cubic root of 180131117 is about 564.7586794107.

Adding to 180131117 its reverse (711131081), we get a palindrome (891262198).

The spelling of 180131117 in words is "one hundred eighty million, one hundred thirty-one thousand, one hundred seventeen".