181113472 has 32 divisors (see below), whose sum is σ = 379807200. Its totient is φ = 85789440.

The previous prime is 181113451. The next prime is 181113479. The reversal of 181113472 is 274311181.

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 181113472.

It is not an unprimeable number, because it can be changed into a prime (181113479) by changing a digit.

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, 34804 + ... + 39667.

It is an arithmetic number, because the mean of its divisors is an integer number (11868975).

Almost surely, 2^181113472 is an apocalyptic number.

It is an amenable number.

181113472 is an abundant number, since it is smaller than the sum of its proper divisors (198693728).

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

181113472 is an equidigital number, since it uses as much as digits as its factorization.

181113472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74504 (or 74492 counting only the distinct ones).

The product of its digits is 1344, while the sum is 28.

The square root of 181113472 is about 13457.8405399975. The cubic root of 181113472 is about 565.7834663065.

The spelling of 181113472 in words is "one hundred eighty-one million, one hundred thirteen thousand, four hundred seventy-two".