2305528875721 has 2 divisors, whose sum is σ = 2305528875722. Its totient is φ = 2305528875720.

The previous prime is 2305528875719. The next prime is 2305528875731. The reversal of 2305528875721 is 1275788255032.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1336162605625 + 969366270096 = 1155925^2 + 984564^2 .

It is a cyclic number.

It is not a de Polignac number, because 2305528875721 - 2¹ = 2305528875719 is a prime.

Together with 2305528875719, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2305528875731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1152764437860 + 1152764437861.

It is an arithmetic number, because the mean of its divisors is an integer number (1152764437861).

Almost surely, 2^{2305528875721} is an apocalyptic number.

It is an amenable number.

2305528875721 is a deficient number, since it is larger than the sum of its proper divisors (1).

2305528875721 is an equidigital number, since it uses as much as digits as its factorization.

2305528875721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9408000, while the sum is 55.

The spelling of 2305528875721 in words is "two trillion, three hundred five billion, five hundred twenty-eight million, eight hundred seventy-five thousand, seven hundred twenty-one".