5305766255221 has 2 divisors, whose sum is σ = 5305766255222. Its totient is φ = 5305766255220.

The previous prime is 5305766255189. The next prime is 5305766255243. The reversal of 5305766255221 is 1225526675035.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3713907122500 + 1591859132721 = 1927150^2 + 1261689^2 .

It is a cyclic number.

It is not a de Polignac number, because 5305766255221 - 2⁵ = 5305766255189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5305766250221) 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, 2652883127610 + 2652883127611.

It is an arithmetic number, because the mean of its divisors is an integer number (2652883127611).

Almost surely, 2^{5305766255221} is an apocalyptic number.

It is an amenable number.

5305766255221 is a deficient number, since it is larger than the sum of its proper divisors (1).

5305766255221 is an equidigital number, since it uses as much as digits as its factorization.

5305766255221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3780000, while the sum is 49.

The spelling of 5305766255221 in words is "five trillion, three hundred five billion, seven hundred sixty-six million, two hundred fifty-five thousand, two hundred twenty-one".