31324312 has 16 divisors (see below), whose sum is σ = 61824600. Its totient is φ = 14837760.

The previous prime is 31324303. The next prime is 31324313. The reversal of 31324312 is 21342313.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 31324312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31324313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102889 + ... + 103192.

Almost surely, 2^31324312 is an apocalyptic number.

It is an amenable number.

31324312 is a deficient number, since it is larger than the sum of its proper divisors (30500288).

31324312 is a wasteful number, since it uses less digits than its factorization.

31324312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206106 (or 206102 counting only the distinct ones).

The product of its digits is 432, while the sum is 19.

The square root of 31324312 is about 5596.8126643653. The cubic root of 31324312 is about 315.2297375037.

Adding to 31324312 its reverse (21342313), we get a palindrome (52666625).

The spelling of 31324312 in words is "thirty-one million, three hundred twenty-four thousand, three hundred twelve".