205316025103061 has 2 divisors, whose sum is σ = 205316025103062. Its totient is φ = 205316025103060.

The previous prime is 205316025103037. The next prime is 205316025103093. The reversal of 205316025103061 is 160301520613502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 174834241800100 + 30481783302961 = 13222490^2 + 5521031^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205316025103061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205316025103561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102658012551530 + 102658012551531.

It is an arithmetic number, because the mean of its divisors is an integer number (102658012551531).

Almost surely, 2^{205316025103061} is an apocalyptic number.

It is an amenable number.

205316025103061 is a deficient number, since it is larger than the sum of its proper divisors (1).

205316025103061 is an equidigital number, since it uses as much as digits as its factorization.

205316025103061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32400, while the sum is 35.

Adding to 205316025103061 its reverse (160301520613502), we get a palindrome (365617545716563).

The spelling of 205316025103061 in words is "two hundred five trillion, three hundred sixteen billion, twenty-five million, one hundred three thousand, sixty-one".