2243320421 has 2 divisors, whose sum is σ = 2243320422. Its totient is φ = 2243320420.

The previous prime is 2243320333. The next prime is 2243320451. The reversal of 2243320421 is 1240233422.

2243320421 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., 2188929796 + 54390625 = 46786^2 + 7375^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2243320421 is a prime.

It is a super-2 number, since 2×2243320421² = 10064973022551234482, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2243320451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1121660210 + 1121660211.

It is an arithmetic number, because the mean of its divisors is an integer number (1121660211).

Almost surely, 2^2243320421 is an apocalyptic number.

It is an amenable number.

2243320421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2243320421 is an equidigital number, since it uses as much as digits as its factorization.

2243320421 is an evil number, because the sum of its binary digits is even.

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

The square root of 2243320421 is about 47363.7036241888. The cubic root of 2243320421 is about 1309.0727118728.

Adding to 2243320421 its reverse (1240233422), we get a palindrome (3483553843).

The spelling of 2243320421 in words is "two billion, two hundred forty-three million, three hundred twenty thousand, four hundred twenty-one".