181013136 has 40 divisors (see below), whose sum is σ = 474032160. Its totient is φ = 59510016.

The previous prime is 181013111. The next prime is 181013141. The reversal of 181013136 is 631310181.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22326 + ... + 29333.

It is an arithmetic number, because the mean of its divisors is an integer number (11850804).

Almost surely, 2^181013136 is an apocalyptic number.

181013136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

181013136 is an abundant number, since it is smaller than the sum of its proper divisors (293019024).

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

181013136 is a wasteful number, since it uses less digits than its factorization.

181013136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51743 (or 51737 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 181013136 is about 13454.1122338116. The cubic root of 181013136 is about 565.6789665591.

The spelling of 181013136 in words is "one hundred eighty-one million, thirteen thousand, one hundred thirty-six".