181045972 has 12 divisors (see below), whose sum is σ = 330605856. Its totient is φ = 86587160.

The previous prime is 181045961. The next prime is 181045973. The reversal of 181045972 is 279540181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181045973) 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, 983854 + ... + 984037.

It is an arithmetic number, because the mean of its divisors is an integer number (27550488).

Almost surely, 2^181045972 is an apocalyptic number.

It is an amenable number.

181045972 is a deficient number, since it is larger than the sum of its proper divisors (149559884).

181045972 is a wasteful number, since it uses less digits than its factorization.

181045972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1967918 (or 1967916 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 37.

The square root of 181045972 is about 13455.3324745247. The cubic root of 181045972 is about 565.7131694387.

The spelling of 181045972 in words is "one hundred eighty-one million, forty-five thousand, nine hundred seventy-two".