2240181 has 6 divisors (see below), whose sum is σ = 3235830. Its totient is φ = 1493448.

The previous prime is 2240159. The next prime is 2240191. The reversal of 2240181 is 1810422.

2240181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 1664100 + 576081 = 1290^2 + 759^2 .

It is not a de Polignac number, because 2240181 - 2¹⁰ = 2239157 is a prime.

It is a super-2 number, since 2×2240181² = 10036821825522, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2240101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 124446 + ... + 124463.

It is an arithmetic number, because the mean of its divisors is an integer number (539305).

2^2240181 is an apocalyptic number.

It is an amenable number.

2240181 is a deficient number, since it is larger than the sum of its proper divisors (995649).

2240181 is a wasteful number, since it uses less digits than its factorization.

2240181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248915 (or 248912 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 2240181 is about 1496.7234213441. The cubic root of 2240181 is about 130.8461764972.

The spelling of 2240181 in words is "two million, two hundred forty thousand, one hundred eighty-one".