181318086 has 24 divisors (see below), whose sum is σ = 393105960. Its totient is φ = 60400896.

The previous prime is 181318043. The next prime is 181318087. The reversal of 181318086 is 680813181.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 181318086.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181318087) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47725 + ... + 51383.

It is an arithmetic number, because the mean of its divisors is an integer number (16379415).

Almost surely, 2^181318086 is an apocalyptic number.

181318086 is an abundant number, since it is smaller than the sum of its proper divisors (211787874).

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

181318086 is a wasteful number, since it uses less digits than its factorization.

181318086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6420 (or 6417 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 36.

The square root of 181318086 is about 13465.4404309699. The cubic root of 181318086 is about 565.9964518417.

The spelling of 181318086 in words is "one hundred eighty-one million, three hundred eighteen thousand, eighty-six".