2040181 has 12 divisors (see below), whose sum is σ = 2416876. Its totient is φ = 1710720.

The previous prime is 2040173. The next prime is 2040191. The reversal of 2040181 is 1810402.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1359556 + 680625 = 1166^2 + 825^2 .

It is not a de Polignac number, because 2040181 - 2³ = 2040173 is a prime.

It is a super-2 number, since 2×2040181² = 8324677025522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2040151) 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, 925 + ... + 2221.

2^2040181 is an apocalyptic number.

It is an amenable number.

2040181 is a deficient number, since it is larger than the sum of its proper divisors (376695).

2040181 is a wasteful number, since it uses less digits than its factorization.

2040181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1332 (or 1321 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 2040181 is about 1428.3490469770. The cubic root of 2040181 is about 126.8302649116.

Adding to 2040181 its reverse (1810402), we get a palindrome (3850583).

The spelling of 2040181 in words is "two million, forty thousand, one hundred eighty-one".