91100115 has 24 divisors (see below), whose sum is σ = 158238288. Its totient is φ = 48484800.

The previous prime is 91100111. The next prime is 91100143. The reversal of 91100115 is 51100119.

It is not a de Polignac number, because 91100115 - 2² = 91100111 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91100111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22765 + ... + 26465.

It is an arithmetic number, because the mean of its divisors is an integer number (6593262).

Almost surely, 2^91100115 is an apocalyptic number.

91100115 is a deficient number, since it is larger than the sum of its proper divisors (67138173).

91100115 is a wasteful number, since it uses less digits than its factorization.

91100115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4259 (or 4256 counting only the distinct ones).

The product of its (nonzero) digits is 45, while the sum is 18.

The square root of 91100115 is about 9544.6380235188. The cubic root of 91100115 is about 449.9590333077.

The spelling of 91100115 in words is "ninety-one million, one hundred thousand, one hundred fifteen".