210566470747481 has 2 divisors, whose sum is σ = 210566470747482. Its totient is φ = 210566470747480.

The previous prime is 210566470747469. The next prime is 210566470747573. The reversal of 210566470747481 is 184747074665012.

It is a happy number.

210566470747481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 191999377555456 + 18567093192025 = 13856384^2 + 4308955^2 .

It is a cyclic number.

It is not a de Polignac number, because 210566470747481 - 2³⁰ = 210565397005657 is a prime.

It is a super-2 number, since 2×210566470747481² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (210566470747421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105283235373740 + 105283235373741.

It is an arithmetic number, because the mean of its divisors is an integer number (105283235373741).

Almost surely, 2^{210566470747481} is an apocalyptic number.

It is an amenable number.

210566470747481 is a deficient number, since it is larger than the sum of its proper divisors (1).

210566470747481 is an equidigital number, since it uses as much as digits as its factorization.

210566470747481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63221760, while the sum is 62.

The spelling of 210566470747481 in words is "two hundred ten trillion, five hundred sixty-six billion, four hundred seventy million, seven hundred forty-seven thousand, four hundred eighty-one".