180131112 has 96 divisors (see below), whose sum is σ = 560239680. Its totient is φ = 51217920.

The previous prime is 180131089. The next prime is 180131113. The reversal of 180131112 is 211131081.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

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

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 120723 + ... + 122205.

It is an arithmetic number, because the mean of its divisors is an integer number (5835830).

Almost surely, 2^180131112 is an apocalyptic number.

180131112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 180131112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (280119840).

180131112 is an abundant number, since it is smaller than the sum of its proper divisors (380108568).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

180131112 is a wasteful number, since it uses less digits than its factorization.

180131112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1743 (or 1736 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

The square root of 180131112 is about 13421.2932312799. The cubic root of 180131112 is about 564.7586741853.

Adding to 180131112 its reverse (211131081), we get a palindrome (391262193).

The spelling of 180131112 in words is "one hundred eighty million, one hundred thirty-one thousand, one hundred twelve".