205520542310071 has 2 divisors, whose sum is σ = 205520542310072. Its totient is φ = 205520542310070.

The previous prime is 205520542310009. The next prime is 205520542310077. The reversal of 205520542310071 is 170013245025502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 205520542310071 - 2⁹ = 205520542309559 is a prime.

It is a super-2 number, since 2×205520542310071² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 205520542310071.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205520542310077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102760271155035 + 102760271155036.

It is an arithmetic number, because the mean of its divisors is an integer number (102760271155036).

Almost surely, 2^{205520542310071} is an apocalyptic number.

205520542310071 is a deficient number, since it is larger than the sum of its proper divisors (1).

205520542310071 is an equidigital number, since it uses as much as digits as its factorization.

205520542310071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84000, while the sum is 37.

Adding to 205520542310071 its reverse (170013245025502), we get a palindrome (375533787335573).

The spelling of 205520542310071 in words is "two hundred five trillion, five hundred twenty billion, five hundred forty-two million, three hundred ten thousand, seventy-one".