181284085 has 8 divisors (see below), whose sum is σ = 217682136. Its totient is φ = 144933120.

The previous prime is 181284079. The next prime is 181284097. The reversal of 181284085 is 580482181.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2634129 + 178649956 = 1623^2 + 13366^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 181284085 - 2¹¹ = 181282037 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 2656 + ... + 19225.

It is an arithmetic number, because the mean of its divisors is an integer number (27210267).

Almost surely, 2^181284085 is an apocalyptic number.

It is an amenable number.

181284085 is a deficient number, since it is larger than the sum of its proper divisors (36398051).

181284085 is a wasteful number, since it uses less digits than its factorization.

181284085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23543.

The product of its (nonzero) digits is 20480, while the sum is 37.

The square root of 181284085 is about 13464.1778434481. The cubic root of 181284085 is about 565.9610708366.

The spelling of 181284085 in words is "one hundred eighty-one million, two hundred eighty-four thousand, eighty-five".