181316132 has 12 divisors (see below), whose sum is σ = 325879260. Its totient is φ = 88207776.

The previous prime is 181316131. The next prime is 181316197. The reversal of 181316132 is 231613181.

It can be written as a sum of positive squares in 2 ways, for example, as 130279396 + 51036736 = 11414^2 + 7144^2 .

It is not an unprimeable number, because it can be changed into a prime (181316131) 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 3 ways as a sum of consecutive naturals, for example, 612407 + ... + 612702.

It is an arithmetic number, because the mean of its divisors is an integer number (27156605).

Almost surely, 2^181316132 is an apocalyptic number.

It is an amenable number.

181316132 is a deficient number, since it is larger than the sum of its proper divisors (144563128).

181316132 is a wasteful number, since it uses less digits than its factorization.

181316132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1225150 (or 1225148 counting only the distinct ones).

The product of its digits is 864, while the sum is 26.

The square root of 181316132 is about 13465.3678746628. The cubic root of 181316132 is about 565.9944186541.

The spelling of 181316132 in words is "one hundred eighty-one million, three hundred sixteen thousand, one hundred thirty-two".