181672132 has 12 divisors (see below), whose sum is σ = 336627900. Its totient is φ = 85492736.

The previous prime is 181672111. The next prime is 181672159. The reversal of 181672132 is 231276181.

It can be written as a sum of positive squares in 2 ways, for example, as 87310336 + 94361796 = 9344^2 + 9714^2 .

It is a junction number, because it is equal to n+sod(n) for n = 181672094 and 181672103.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1335757 + ... + 1335892.

It is an arithmetic number, because the mean of its divisors is an integer number (28052325).

Almost surely, 2^181672132 is an apocalyptic number.

It is an amenable number.

181672132 is a deficient number, since it is larger than the sum of its proper divisors (154955768).

181672132 is a wasteful number, since it uses less digits than its factorization.

181672132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2671670 (or 2671668 counting only the distinct ones).

The product of its digits is 4032, while the sum is 31.

The square root of 181672132 is about 13478.5804890574. The cubic root of 181672132 is about 566.3646050277.

The spelling of 181672132 in words is "one hundred eighty-one million, six hundred seventy-two thousand, one hundred thirty-two".