111831887 has 12 divisors (see below), whose sum is σ = 116364528. Its totient is φ = 107452800.

The previous prime is 111831883. The next prime is 111831893. The reversal of 111831887 is 788138111.

It is not a de Polignac number, because 111831887 - 2² = 111831883 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111831887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111831883) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 118883 + ... + 119819.

It is an arithmetic number, because the mean of its divisors is an integer number (9697044).

Almost surely, 2^111831887 is an apocalyptic number.

111831887 is a deficient number, since it is larger than the sum of its proper divisors (4532641).

111831887 is an frugal number, since it uses more digits than its factorization.

111831887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1090 (or 1049 counting only the distinct ones).

The product of its digits is 10752, while the sum is 38.

The square root of 111831887 is about 10575.0596688624. The cubic root of 111831887 is about 481.7871557279.

Adding to 111831887 its reverse (788138111), we get a palindrome (899969998).

The spelling of 111831887 in words is "one hundred eleven million, eight hundred thirty-one thousand, eight hundred eighty-seven".