111131856 has 120 divisors (see below), whose sum is σ = 359334144. Its totient is φ = 31687680.

The previous prime is 111131849. The next prime is 111131863. The reversal of 111131856 is 658131111.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (111131849) and next prime (111131863).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24865 + ... + 28991.

Almost surely, 2^111131856 is an apocalyptic number.

111131856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111131856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (179667072).

111131856 is an abundant number, since it is smaller than the sum of its proper divisors (248202288).

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

111131856 is a wasteful number, since it uses less digits than its factorization.

111131856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4169 (or 4160 counting only the distinct ones).

The product of its digits is 720, while the sum is 27.

The square root of 111131856 is about 10541.9095044494. The cubic root of 111131856 is about 480.7797742144.

Adding to 111131856 its reverse (658131111), we get a palindrome (769262967).

The spelling of 111131856 in words is "one hundred eleven million, one hundred thirty-one thousand, eight hundred fifty-six".