205353443497 has 2 divisors, whose sum is σ = 205353443498. Its totient is φ = 205353443496.

The previous prime is 205353443453. The next prime is 205353443557. The reversal of 205353443497 is 794344353502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 202316441616 + 3037001881 = 449796^2 + 55109^2 .

It is a cyclic number.

It is not a de Polignac number, because 205353443497 - 2²⁷ = 205219225769 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 205353443497.

It is not a weakly prime, because it can be changed into another prime (205353440497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102676721748 + 102676721749.

It is an arithmetic number, because the mean of its divisors is an integer number (102676721749).

Almost surely, 2^205353443497 is an apocalyptic number.

It is an amenable number.

205353443497 is a deficient number, since it is larger than the sum of its proper divisors (1).

205353443497 is an equidigital number, since it uses as much as digits as its factorization.

205353443497 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5443200, while the sum is 49.

Adding to 205353443497 its reverse (794344353502), we get a palindrome (999697796999).

The spelling of 205353443497 in words is "two hundred five billion, three hundred fifty-three million, four hundred forty-three thousand, four hundred ninety-seven".