31030312 has 16 divisors (see below), whose sum is σ = 60711840. Its totient is φ = 14840496.

The previous prime is 31030267. The next prime is 31030327. The reversal of 31030312 is 21303013.

It is a junction number, because it is equal to n+sod(n) for n = 31030292 and 31030301.

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 3 ways as a sum of consecutive naturals, for example, 84138 + ... + 84505.

It is an arithmetic number, because the mean of its divisors is an integer number (3794490).

Almost surely, 2^31030312 is an apocalyptic number.

It is an amenable number.

31030312 is a deficient number, since it is larger than the sum of its proper divisors (29681528).

31030312 is a wasteful number, since it uses less digits than its factorization.

31030312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168672 (or 168668 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 13.

The square root of 31030312 is about 5570.4857956914. The cubic root of 31030312 is about 314.2404206274.

Adding to 31030312 its reverse (21303013), we get a palindrome (52333325).

The spelling of 31030312 in words is "thirty-one million, thirty thousand, three hundred twelve".