31130312 has 32 divisors (see below), whose sum is σ = 59633280. Its totient is φ = 15232320.

The previous prime is 31130299. The next prime is 31130327. The reversal of 31130312 is 21303113.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114737 + ... + 115007.

It is an arithmetic number, because the mean of its divisors is an integer number (1863540).

Almost surely, 2^31130312 is an apocalyptic number.

It is an amenable number.

31130312 is a deficient number, since it is larger than the sum of its proper divisors (28502968).

31130312 is a wasteful number, since it uses less digits than its factorization.

31130312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 533 (or 529 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 14.

The square root of 31130312 is about 5579.4544536182. The cubic root of 31130312 is about 314.5776215133.

Adding to 31130312 its reverse (21303113), we get a palindrome (52433425).

The spelling of 31130312 in words is "thirty-one million, one hundred thirty thousand, three hundred twelve".