111930831 has 12 divisors (see below), whose sum is σ = 161782920. Its totient is φ = 74572080.

The previous prime is 111930823. The next prime is 111930853. The reversal of 111930831 is 138039111.

It is a happy number.

It is not a de Polignac number, because 111930831 - 2³ = 111930823 is a prime.

It is a super-2 number, since 2×111930831² = 25057021856701122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 111930795 and 111930804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111930031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15616 + ... + 21626.

It is an arithmetic number, because the mean of its divisors is an integer number (13481910).

Almost surely, 2^111930831 is an apocalyptic number.

111930831 is a deficient number, since it is larger than the sum of its proper divisors (49852089).

111930831 is a wasteful number, since it uses less digits than its factorization.

111930831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8086 (or 8083 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

The square root of 111930831 is about 10579.7368114713. The cubic root of 111930831 is about 481.9292019658.

Adding to 111930831 its reverse (138039111), we get a palindrome (249969942).

The spelling of 111930831 in words is "one hundred eleven million, nine hundred thirty thousand, eight hundred thirty-one".