181411085 has 4 divisors (see below), whose sum is σ = 217693308. Its totient is φ = 145128864.

The previous prime is 181411081. The next prime is 181411091. The reversal of 181411085 is 580114181.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 32058244 + 149352841 = 5662^2 + 12221^2 .

It is a cyclic number.

It is not a de Polignac number, because 181411085 - 2² = 181411081 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181411081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18141104 + ... + 18141113.

It is an arithmetic number, because the mean of its divisors is an integer number (54423327).

Almost surely, 2^181411085 is an apocalyptic number.

It is an amenable number.

181411085 is a deficient number, since it is larger than the sum of its proper divisors (36282223).

181411085 is an equidigital number, since it uses as much as digits as its factorization.

181411085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36282222.

The product of its (nonzero) digits is 1280, while the sum is 29.

The square root of 181411085 is about 13468.8932358973. The cubic root of 181411085 is about 566.0932028213.

The spelling of 181411085 in words is "one hundred eighty-one million, four hundred eleven thousand, eighty-five".