2204421643 has 2 divisors, whose sum is σ = 2204421644. Its totient is φ = 2204421642.

The previous prime is 2204421641. The next prime is 2204421647. The reversal of 2204421643 is 3461244022.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2204421643 - 2¹ = 2204421641 is a prime.

Together with 2204421641, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2204421641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1102210821 + 1102210822.

It is an arithmetic number, because the mean of its divisors is an integer number (1102210822).

Almost surely, 2^2204421643 is an apocalyptic number.

2204421643 is a deficient number, since it is larger than the sum of its proper divisors (1).

2204421643 is an equidigital number, since it uses as much as digits as its factorization.

2204421643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 28.

The square root of 2204421643 is about 46951.2688113964. The cubic root of 2204421643 is about 1301.4621896803.

Adding to 2204421643 its reverse (3461244022), we get a palindrome (5665665665).

The spelling of 2204421643 in words is "two billion, two hundred four million, four hundred twenty-one thousand, six hundred forty-three".