31214312 has 48 divisors (see below), whose sum is σ = 64985760. Its totient is φ = 14026496.

The previous prime is 31214291. The next prime is 31214317. The reversal of 31214312 is 21341213.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is not an unprimeable number, because it can be changed into a prime (31214317) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 52883 + ... + 53469.

It is an arithmetic number, because the mean of its divisors is an integer number (1353870).

Almost surely, 2^31214312 is an apocalyptic number.

It is an amenable number.

31214312 is an abundant number, since it is smaller than the sum of its proper divisors (33771448).

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

31214312 is a wasteful number, since it uses less digits than its factorization.

31214312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 650 (or 629 counting only the distinct ones).

The product of its digits is 144, while the sum is 17.

The square root of 31214312 is about 5586.9770001316. The cubic root of 31214312 is about 314.8603126341.

Adding to 31214312 its reverse (21341213), we get a palindrome (52555525).

The spelling of 31214312 in words is "thirty-one million, two hundred fourteen thousand, three hundred twelve".