2402242221 has 4 divisors (see below), whose sum is σ = 3202989632. Its totient is φ = 1601494812.

The previous prime is 2402242207. The next prime is 2402242223. The reversal of 2402242221 is 1222422042.

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 not a de Polignac number, because 2402242221 - 2⁷ = 2402242093 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 (2402242223) 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, 400373701 + ... + 400373706.

It is an arithmetic number, because the mean of its divisors is an integer number (800747408).

Almost surely, 2^2402242221 is an apocalyptic number.

It is an amenable number.

2402242221 is a deficient number, since it is larger than the sum of its proper divisors (800747411).

2402242221 is an equidigital number, since it uses as much as digits as its factorization.

2402242221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 800747410.

The product of its (nonzero) digits is 1024, while the sum is 21.

The square root of 2402242221 is about 49012.6740853833. The cubic root of 2402242221 is about 1339.2827194464.

Adding to 2402242221 its reverse (1222422042), we get a palindrome (3624664263).

The spelling of 2402242221 in words is "two billion, four hundred two million, two hundred forty-two thousand, two hundred twenty-one".