2265740221 has 2 divisors, whose sum is σ = 2265740222. Its totient is φ = 2265740220.

The previous prime is 2265740209. The next prime is 2265740227. The reversal of 2265740221 is 1220475622.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2175756025 + 89984196 = 46645^2 + 9486^2 .

It is a cyclic number.

It is not a de Polignac number, because 2265740221 - 2⁹ = 2265739709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2265740227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1132870110 + 1132870111.

It is an arithmetic number, because the mean of its divisors is an integer number (1132870111).

Almost surely, 2^2265740221 is an apocalyptic number.

It is an amenable number.

2265740221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2265740221 is an equidigital number, since it uses as much as digits as its factorization.

2265740221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 2265740221 is about 47599.7922369415. The cubic root of 2265740221 is about 1313.4192325237.

The spelling of 2265740221 in words is "two billion, two hundred sixty-five million, seven hundred forty thousand, two hundred twenty-one".