2115192817 has 2 divisors, whose sum is σ = 2115192818. Its totient is φ = 2115192816.

The previous prime is 2115192797. The next prime is 2115192839. The reversal of 2115192817 is 7182915112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2115172081 + 20736 = 45991^2 + 144^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2115192817 is a prime.

It is not a weakly prime, because it can be changed into another prime (2115192857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1057596408 + 1057596409.

It is an arithmetic number, because the mean of its divisors is an integer number (1057596409).

Almost surely, 2^2115192817 is an apocalyptic number.

It is an amenable number.

2115192817 is a deficient number, since it is larger than the sum of its proper divisors (1).

2115192817 is an equidigital number, since it uses as much as digits as its factorization.

2115192817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 37.

The square root of 2115192817 is about 45991.2254348588. The cubic root of 2115192817 is about 1283.6599386788.

The spelling of 2115192817 in words is "two billion, one hundred fifteen million, one hundred ninety-two thousand, eight hundred seventeen".