31111112 has 8 divisors (see below), whose sum is σ = 58333350. Its totient is φ = 15555552.

The previous prime is 31111103. The next prime is 31111121. The reversal of 31111112 is 21111113.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (31111103) and next prime (31111121).

It can be written as a sum of positive squares in only one way, i.e., 30846916 + 264196 = 5554^2 + 514^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 31111093 and 31111102.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1944437 + ... + 1944452.

Almost surely, 2^31111112 is an apocalyptic number.

It is an amenable number.

31111112 is a deficient number, since it is larger than the sum of its proper divisors (27222238).

31111112 is a wasteful number, since it uses less digits than its factorization.

31111112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3888895 (or 3888891 counting only the distinct ones).

The product of its digits is 6, while the sum is 11.

The square root of 31111112 is about 5577.7335899091. The cubic root of 31111112 is about 314.5129350165.

Adding to 31111112 its reverse (21111113), we get a palindrome (52222225).

Subtracting from 31111112 its reverse (21111113), we obtain a palindrome (9999999).

It can be divided in two parts, 3111111 and 2, that added together give a palindrome (3111113).

The spelling of 31111112 in words is "thirty-one million, one hundred eleven thousand, one hundred twelve".