2836181 has 4 divisors (see below), whose sum is σ = 2864364. Its totient is φ = 2808000.

The previous prime is 2836139. The next prime is 2836201. The reversal of 2836181 is 1816382.

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 1865956 + 970225 = 1366^2 + 985^2 .

It is a cyclic number.

It is not a de Polignac number, because 2836181 - 2⁶ = 2836117 is a prime.

It is a super-2 number, since 2×2836181² = 16087845329522, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2836081) 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, 13940 + ... + 14141.

It is an arithmetic number, because the mean of its divisors is an integer number (716091).

2^2836181 is an apocalyptic number.

It is an amenable number.

2836181 is a deficient number, since it is larger than the sum of its proper divisors (28183).

2836181 is a wasteful number, since it uses less digits than its factorization.

2836181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28182.

The product of its digits is 2304, while the sum is 29.

The square root of 2836181 is about 1684.0964936725. The cubic root of 2836181 is about 141.5504695792.

The spelling of 2836181 in words is "two million, eight hundred thirty-six thousand, one hundred eighty-one".