3122717561 has 2 divisors, whose sum is σ = 3122717562. Its totient is φ = 3122717560.

The previous prime is 3122717557. The next prime is 3122717657. The reversal of 3122717561 is 1657172213.

3122717561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2961427561 + 161290000 = 54419^2 + 12700^2 .

It is an emirp because it is prime and its reverse (1657172213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3122717561 - 2² = 3122717557 is a prime.

It is not a weakly prime, because it can be changed into another prime (3122717501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1561358780 + 1561358781.

It is an arithmetic number, because the mean of its divisors is an integer number (1561358781).

Almost surely, 2^3122717561 is an apocalyptic number.

It is an amenable number.

3122717561 is a deficient number, since it is larger than the sum of its proper divisors (1).

3122717561 is an equidigital number, since it uses as much as digits as its factorization.

3122717561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17640, while the sum is 35.

The square root of 3122717561 is about 55881.2809534642. The cubic root of 3122717561 is about 1461.6528415006.

Adding to 3122717561 its reverse (1657172213), we get a palindrome (4779889774).

The spelling of 3122717561 in words is "three billion, one hundred twenty-two million, seven hundred seventeen thousand, five hundred sixty-one".