2115808091 has 2 divisors, whose sum is σ = 2115808092. Its totient is φ = 2115808090.

The previous prime is 2115808087. The next prime is 2115808133. The reversal of 2115808091 is 1908085112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2115808091 - 2² = 2115808087 is a prime.

It is not a weakly prime, because it can be changed into another prime (2115808021) 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, 1057904045 + 1057904046.

It is an arithmetic number, because the mean of its divisors is an integer number (1057904046).

Almost surely, 2^2115808091 is an apocalyptic number.

2115808091 is a deficient number, since it is larger than the sum of its proper divisors (1).

2115808091 is an equidigital number, since it uses as much as digits as its factorization.

2115808091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 35.

The square root of 2115808091 is about 45997.9139853102. The cubic root of 2115808091 is about 1283.7843916382.

The spelling of 2115808091 in words is "two billion, one hundred fifteen million, eight hundred eight thousand, ninety-one".