2443320221 has 2 divisors, whose sum is σ = 2443320222. Its totient is φ = 2443320220.

The previous prime is 2443320179. The next prime is 2443320227. The reversal of 2443320221 is 1220233442.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1936440025 + 506880196 = 44005^2 + 22514^2 .

It is a cyclic number.

It is not a de Polignac number, because 2443320221 - 2²² = 2439125917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2443320227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1221660110 + 1221660111.

It is an arithmetic number, because the mean of its divisors is an integer number (1221660111).

Almost surely, 2^2443320221 is an apocalyptic number.

It is an amenable number.

2443320221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2443320221 is an equidigital number, since it uses as much as digits as its factorization.

2443320221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 2443320221 is about 49429.9526704204. The cubic root of 2443320221 is about 1346.8734635354.

Adding to 2443320221 its reverse (1220233442), we get a palindrome (3663553663).

The spelling of 2443320221 in words is "two billion, four hundred forty-three million, three hundred twenty thousand, two hundred twenty-one".