3103240561 has 2 divisors, whose sum is σ = 3103240562. Its totient is φ = 3103240560.

The previous prime is 3103240559. The next prime is 3103240627. The reversal of 3103240561 is 1650423013.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3098592225 + 4648336 = 55665^2 + 2156^2 .

It is an emirp because it is prime and its reverse (1650423013) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3103240561 - 2¹ = 3103240559 is a prime.

Together with 3103240559, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (3103280561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1551620280 + 1551620281.

It is an arithmetic number, because the mean of its divisors is an integer number (1551620281).

Almost surely, 2^3103240561 is an apocalyptic number.

It is an amenable number.

3103240561 is a deficient number, since it is larger than the sum of its proper divisors (1).

3103240561 is an equidigital number, since it uses as much as digits as its factorization.

3103240561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 3103240561 is about 55706.7371239781. The cubic root of 3103240561 is about 1458.6076299835.

Adding to 3103240561 its reverse (1650423013), we get a palindrome (4753663574).

The spelling of 3103240561 in words is "three billion, one hundred three million, two hundred forty thousand, five hundred sixty-one".