31112113 has 4 divisors (see below), whose sum is σ = 31699188. Its totient is φ = 30525040.

The previous prime is 31112093. The next prime is 31112119. The reversal of 31112113 is 31121113.

31112113 is nontrivially palindromic in base 8.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31121113 = 503 ⋅61871.

It can be written as a sum of positive squares in 2 ways, for example, as 9878449 + 21233664 = 3143^2 + 4608^2 .

It is a cyclic number.

It is not a de Polignac number, because 31112113 - 2⁹ = 31111601 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31112093 and 31112102.

It is not an unprimeable number, because it can be changed into a prime (31112119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 293458 + ... + 293563.

It is an arithmetic number, because the mean of its divisors is an integer number (7924797).

Almost surely, 2^31112113 is an apocalyptic number.

It is an amenable number.

31112113 is a deficient number, since it is larger than the sum of its proper divisors (587075).

31112113 is an equidigital number, since it uses as much as digits as its factorization.

31112113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 587074.

The product of its digits is 18, while the sum is 13.

The square root of 31112113 is about 5577.8233209739. The cubic root of 31112113 is about 314.5163081314.

Adding to 31112113 its reverse (31121113), we get a palindrome (62233226).

The spelling of 31112113 in words is "thirty-one million, one hundred twelve thousand, one hundred thirteen".