111938031 has 20 divisors (see below), whose sum is σ = 168852112. Its totient is φ = 73895328.

The previous prime is 111938009. The next prime is 111938041. The reversal of 111938031 is 130839111.

It is a happy number.

It is not a de Polignac number, because 111938031 - 2⁶ = 111937967 is a prime.

It is a super-2 number, since 2×111938031² = 25060245568313922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111937986 and 111938004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111938041) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1635 + ... + 15051.

Almost surely, 2^111938031 is an apocalyptic number.

111938031 is a deficient number, since it is larger than the sum of its proper divisors (56914081).

111938031 is a wasteful number, since it uses less digits than its factorization.

111938031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13532 (or 13523 counting only the distinct ones).

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

The square root of 111938031 is about 10580.0770791143. The cubic root of 111938031 is about 481.9395351803.

The spelling of 111938031 in words is "one hundred eleven million, nine hundred thirty-eight thousand, thirty-one".