9215505613 has 2 divisors, whose sum is σ = 9215505614. Its totient is φ = 9215505612.

The previous prime is 9215505587. The next prime is 9215505617. The reversal of 9215505613 is 3165055129.

9215505613 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6418893924 + 2796611689 = 80118^2 + 52883^2 .

It is a cyclic number.

It is not a de Polignac number, because 9215505613 - 2¹⁷ = 9215374541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9215505617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4607752806 + 4607752807.

It is an arithmetic number, because the mean of its divisors is an integer number (4607752807).

Almost surely, 2^9215505613 is an apocalyptic number.

It is an amenable number.

9215505613 is a deficient number, since it is larger than the sum of its proper divisors (1).

9215505613 is an equidigital number, since it uses as much as digits as its factorization.

9215505613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40500, while the sum is 37.

The square root of 9215505613 is about 95997.4250331747. The cubic root of 9215505613 is about 2096.5556245209. Note that the first 3 decimals are identical.

The spelling of 9215505613 in words is "nine billion, two hundred fifteen million, five hundred five thousand, six hundred thirteen".