2400044221 has 4 divisors (see below), whose sum is σ = 2427011100. Its totient is φ = 2373077344.

The previous prime is 2400044203. The next prime is 2400044267. The reversal of 2400044221 is 1224400042.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1224400042 = 2 ⋅612200021.

It can be written as a sum of positive squares in 2 ways, for example, as 436224996 + 1963819225 = 20886^2 + 44315^2 .

It is a cyclic number.

It is not a de Polignac number, because 2400044221 - 2⁵ = 2400044189 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 (2400044281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13483306 + ... + 13483483.

It is an arithmetic number, because the mean of its divisors is an integer number (606752775).

Almost surely, 2^2400044221 is an apocalyptic number.

It is an amenable number.

2400044221 is a deficient number, since it is larger than the sum of its proper divisors (26966879).

2400044221 is an equidigital number, since it uses as much as digits as its factorization.

2400044221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26966878.

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 2400044221 is about 48990.2461822759. The cubic root of 2400044221 is about 1338.8741231679.

Adding to 2400044221 its reverse (1224400042), we get a palindrome (3624444263).

The spelling of 2400044221 in words is "two billion, four hundred million, forty-four thousand, two hundred twenty-one".