2440002221 has 4 divisors (see below), whose sum is σ = 2441232192. Its totient is φ = 2438772252.

The previous prime is 2440002193. The next prime is 2440002223. The reversal of 2440002221 is 1222000442.

It is a happy number.

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 2440002221 - 2¹⁴ = 2439985837 is a prime.

It is a super-2 number, since 2×2440002221² = 11907221676969865682, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2440002221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2440002223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 612005 + ... + 615978.

It is an arithmetic number, because the mean of its divisors is an integer number (610308048).

Almost surely, 2^2440002221 is an apocalyptic number.

It is an amenable number.

2440002221 is a deficient number, since it is larger than the sum of its proper divisors (1229971).

2440002221 is a wasteful number, since it uses less digits than its factorization.

2440002221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1229970.

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

The square root of 2440002221 is about 49396.3786223241. The cubic root of 2440002221 is about 1346.2635079298.

Adding to 2440002221 its reverse (1222000442), we get a palindrome (3662002663).

The spelling of 2440002221 in words is "two billion, four hundred forty million, two thousand, two hundred twenty-one".