31340112 has 80 divisors (see below), whose sum is σ = 86601600. Its totient is φ = 9732096.

The previous prime is 31340093. The next prime is 31340143. The reversal of 31340112 is 21104313.

It is a junction number, because it is equal to n+sod(n) for n = 31340091 and 31340100.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 157389 + ... + 157587.

It is an arithmetic number, because the mean of its divisors is an integer number (1082520).

Almost surely, 2^31340112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31340112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43300800).

31340112 is an abundant number, since it is smaller than the sum of its proper divisors (55261488).

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

31340112 is a wasteful number, since it uses less digits than its factorization.

31340112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420 (or 414 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 31340112 is about 5598.2240040927. The cubic root of 31340112 is about 315.2827292787.

Adding to 31340112 its reverse (21104313), we get a palindrome (52444425).

The spelling of 31340112 in words is "thirty-one million, three hundred forty thousand, one hundred twelve".