31480312 has 24 divisors (see below), whose sum is σ = 61144200. Its totient is φ = 15194144.

The previous prime is 31480289. The next prime is 31480349. The reversal of 31480312 is 21308413.

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 5 ways as a sum of consecutive naturals, for example, 4389 + ... + 9067.

It is an arithmetic number, because the mean of its divisors is an integer number (2547675).

Almost surely, 2^31480312 is an apocalyptic number.

It is an amenable number.

31480312 is a deficient number, since it is larger than the sum of its proper divisors (29663888).

31480312 is a wasteful number, since it uses less digits than its factorization.

31480312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4743 (or 4710 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 31480312 is about 5610.7318595705. The cubic root of 31480312 is about 315.7521690865.

Adding to 31480312 its reverse (21308413), we get a palindrome (52788725).

The spelling of 31480312 in words is "thirty-one million, four hundred eighty thousand, three hundred twelve".