2221243993 has 2 divisors, whose sum is σ = 2221243994. Its totient is φ = 2221243992.

The previous prime is 2221243909. The next prime is 2221244033. The reversal of 2221243993 is 3993421222.

2221243993 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2085474889 + 135769104 = 45667^2 + 11652^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2221243993 is a prime.

It is not a weakly prime, because it can be changed into another prime (2221241993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110621996 + 1110621997.

It is an arithmetic number, because the mean of its divisors is an integer number (1110621997).

Almost surely, 2^2221243993 is an apocalyptic number.

It is an amenable number.

2221243993 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221243993 is an equidigital number, since it uses as much as digits as its factorization.

2221243993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46656, while the sum is 37.

The square root of 2221243993 is about 47130.0752492503. The cubic root of 2221243993 is about 1304.7643703894.

The spelling of 2221243993 in words is "two billion, two hundred twenty-one million, two hundred forty-three thousand, nine hundred ninety-three".