111051990 has 96 divisors (see below), whose sum is σ = 349427520. Its totient is φ = 23887872.

The previous prime is 111051989. The next prime is 111052001. The reversal of 111051990 is 99150111.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5526 + ... + 15894.

It is an arithmetic number, because the mean of its divisors is an integer number (3639870).

Almost surely, 2^111051990 is an apocalyptic number.

111051990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 111051990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174713760).

111051990 is an abundant number, since it is smaller than the sum of its proper divisors (238375530).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111051990 is a wasteful number, since it uses less digits than its factorization.

111051990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10406 (or 10403 counting only the distinct ones).

The product of its (nonzero) digits is 405, while the sum is 27.

The square root of 111051990 is about 10538.1208002186. The cubic root of 111051990 is about 480.6645742443.

The spelling of 111051990 in words is "one hundred eleven million, fifty-one thousand, nine hundred ninety".