5213415661 has 2 divisors, whose sum is σ = 5213415662. Its totient is φ = 5213415660.

The previous prime is 5213415629. The next prime is 5213415679. The reversal of 5213415661 is 1665143125.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2682722025 + 2530693636 = 51795^2 + 50306^2 .

It is a cyclic number.

It is not a de Polignac number, because 5213415661 - 2⁵ = 5213415629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5213415611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2606707830 + 2606707831.

It is an arithmetic number, because the mean of its divisors is an integer number (2606707831).

Almost surely, 2^5213415661 is an apocalyptic number.

It is an amenable number.

5213415661 is a deficient number, since it is larger than the sum of its proper divisors (1).

5213415661 is an equidigital number, since it uses as much as digits as its factorization.

5213415661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21600, while the sum is 34.

The square root of 5213415661 is about 72203.9864619676. The cubic root of 5213415661 is about 1733.9668248521.

Adding to 5213415661 its reverse (1665143125), we get a palindrome (6878558786).

The spelling of 5213415661 in words is "five billion, two hundred thirteen million, four hundred fifteen thousand, six hundred sixty-one".