205242415061 has 2 divisors, whose sum is σ = 205242415062. Its totient is φ = 205242415060.

The previous prime is 205242415013. The next prime is 205242415067. The reversal of 205242415061 is 160514242502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 131641980625 + 73600434436 = 362825^2 + 271294^2 .

It is a cyclic number.

It is not a de Polignac number, because 205242415061 - 2²⁶ = 205175306197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205242415067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102621207530 + 102621207531.

It is an arithmetic number, because the mean of its divisors is an integer number (102621207531).

Almost surely, 2^205242415061 is an apocalyptic number.

It is an amenable number.

205242415061 is a deficient number, since it is larger than the sum of its proper divisors (1).

205242415061 is an equidigital number, since it uses as much as digits as its factorization.

205242415061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19200, while the sum is 32.

Adding to 205242415061 its reverse (160514242502), we get a palindrome (365756657563).

The spelling of 205242415061 in words is "two hundred five billion, two hundred forty-two million, four hundred fifteen thousand, sixty-one".