181672133 has 8 divisors (see below), whose sum is σ = 183323136. Its totient is φ = 180028800.

The previous prime is 181672111. The next prime is 181672159. The reversal of 181672133 is 331276181.

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

It is a cyclic number.

It is not a de Polignac number, because 181672133 - 2⁶ = 181672069 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 181672133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181672333) 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, 52373 + ... + 55733.

It is an arithmetic number, because the mean of its divisors is an integer number (22915392).

Almost surely, 2^181672133 is an apocalyptic number.

It is an amenable number.

181672133 is a deficient number, since it is larger than the sum of its proper divisors (1651003).

181672133 is a wasteful number, since it uses less digits than its factorization.

181672133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3835.

The product of its digits is 6048, while the sum is 32.

The square root of 181672133 is about 13478.5805261533. The cubic root of 181672133 is about 566.3646060669.

The spelling of 181672133 in words is "one hundred eighty-one million, six hundred seventy-two thousand, one hundred thirty-three".