111997115 has 16 divisors (see below), whose sum is σ = 143270400. Its totient is φ = 83801952.

The previous prime is 111997091. The next prime is 111997121. The reversal of 111997115 is 511799111.

It is a cyclic number.

It is not a de Polignac number, because 111997115 - 2¹⁰ = 111996091 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44 + ... + 14966.

It is an arithmetic number, because the mean of its divisors is an integer number (8954400).

Almost surely, 2^111997115 is an apocalyptic number.

111997115 is a deficient number, since it is larger than the sum of its proper divisors (31273285).

111997115 is a wasteful number, since it uses less digits than its factorization.

111997115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15026.

The product of its digits is 2835, while the sum is 35.

The square root of 111997115 is about 10582.8689399425. The cubic root of 111997115 is about 482.0243139540.

The spelling of 111997115 in words is "one hundred eleven million, nine hundred ninety-seven thousand, one hundred fifteen".