2240204021 has 4 divisors (see below), whose sum is σ = 2443858944. Its totient is φ = 2036549100.

The previous prime is 2240204009. The next prime is 2240204023. The reversal of 2240204021 is 1204020422.

It is a happy number.

2240204021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2240204021 - 2²⁶ = 2173095157 is a prime.

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 (2240204023) 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, 101827445 + ... + 101827466.

It is an arithmetic number, because the mean of its divisors is an integer number (610964736).

Almost surely, 2^2240204021 is an apocalyptic number.

It is an amenable number.

2240204021 is a deficient number, since it is larger than the sum of its proper divisors (203654923).

2240204021 is a wasteful number, since it uses less digits than its factorization.

2240204021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203654922.

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 2240204021 is about 47330.7935809236. The cubic root of 2240204021 is about 1308.4662470492.

Adding to 2240204021 its reverse (1204020422), we get a palindrome (3444224443).

The spelling of 2240204021 in words is "two billion, two hundred forty million, two hundred four thousand, twenty-one".