31313112 has 16 divisors (see below), whose sum is σ = 78282840. Its totient is φ = 10437696.

The previous prime is 31313081. The next prime is 31313119. The reversal of 31313112 is 21131313.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 31313091 and 31313100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31313119) 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, 652333 + ... + 652380.

Almost surely, 2^31313112 is an apocalyptic number.

It is an amenable number.

31313112 is an abundant number, since it is smaller than the sum of its proper divisors (46969728).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31313112 is a wasteful number, since it uses less digits than its factorization.

31313112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1304722 (or 1304718 counting only the distinct ones).

The product of its digits is 54, while the sum is 15.

The square root of 31313112 is about 5595.8120054198. The cubic root of 31313112 is about 315.1921629202.

Adding to 31313112 its reverse (21131313), we get a palindrome (52444425).

It can be divided in two parts, 3131311 and 2, that added together give a palindrome (3131313).

The spelling of 31313112 in words is "thirty-one million, three hundred thirteen thousand, one hundred twelve".