2115808291 has 2 divisors, whose sum is σ = 2115808292. Its totient is φ = 2115808290.

The previous prime is 2115808267. The next prime is 2115808319. The reversal of 2115808291 is 1928085112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2115808291 - 2⁹ = 2115807779 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2115808291.

It is not a weakly prime, because it can be changed into another prime (2115808091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1057904145 + 1057904146.

It is an arithmetic number, because the mean of its divisors is an integer number (1057904146).

Almost surely, 2^2115808291 is an apocalyptic number.

2115808291 is a deficient number, since it is larger than the sum of its proper divisors (1).

2115808291 is an equidigital number, since it uses as much as digits as its factorization.

2115808291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11520, while the sum is 37.

The square root of 2115808291 is about 45997.9161593218. The cubic root of 2115808291 is about 1283.7844320888.

The spelling of 2115808291 in words is "two billion, one hundred fifteen million, eight hundred eight thousand, two hundred ninety-one".