111155998 has 8 divisors (see below), whose sum is σ = 167469192. Its totient is φ = 55332936.

The previous prime is 111155983. The next prime is 111156113. The reversal of 111155998 is 899551111.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 111155998.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121965 + ... + 122872.

It is an arithmetic number, because the mean of its divisors is an integer number (20933649).

Almost surely, 2^111155998 is an apocalyptic number.

111155998 is a deficient number, since it is larger than the sum of its proper divisors (56313194).

111155998 is a wasteful number, since it uses less digits than its factorization.

111155998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245066.

The product of its digits is 16200, while the sum is 40.

The square root of 111155998 is about 10543.0544909907. The cubic root of 111155998 is about 480.8145861496.

The spelling of 111155998 in words is "one hundred eleven million, one hundred fifty-five thousand, nine hundred ninety-eight".