181013072 has 20 divisors (see below), whose sum is σ = 350962656. Its totient is φ = 90442080.

The previous prime is 181013069. The next prime is 181013081. The reversal of 181013072 is 270310181.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25853 + ... + 32099.

Almost surely, 2^181013072 is an apocalyptic number.

It is an amenable number.

181013072 is a deficient number, since it is larger than the sum of its proper divisors (169949584).

181013072 is a wasteful number, since it uses less digits than its factorization.

181013072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8066 (or 8060 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 23.

The square root of 181013072 is about 13454.1098553565. The cubic root of 181013072 is about 565.6788998909.

The spelling of 181013072 in words is "one hundred eighty-one million, thirteen thousand, seventy-two".