5206103561 has 2 divisors, whose sum is σ = 5206103562. Its totient is φ = 5206103560.

The previous prime is 5206103533. The next prime is 5206103603. The reversal of 5206103561 is 1653016025.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5102959225 + 103144336 = 71435^2 + 10156^2 .

It is a cyclic number.

It is not a de Polignac number, because 5206103561 - 2¹⁰ = 5206102537 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (5206103501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2603051780 + 2603051781.

It is an arithmetic number, because the mean of its divisors is an integer number (2603051781).

Almost surely, 2^5206103561 is an apocalyptic number.

It is an amenable number.

5206103561 is a deficient number, since it is larger than the sum of its proper divisors (1).

5206103561 is an equidigital number, since it uses as much as digits as its factorization.

5206103561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 5206103561 is about 72153.3336790477. Note that the first 3 decimals coincide. The cubic root of 5206103561 is about 1733.1557845219.

Adding to 5206103561 its reverse (1653016025), we get a palindrome (6859119586).

The spelling of 5206103561 in words is "five billion, two hundred six million, one hundred three thousand, five hundred sixty-one".