31232313 has 12 divisors (see below), whose sum is σ = 51558208. Its totient is φ = 17847000.

The previous prime is 31232293. The next prime is 31232347. The reversal of 31232313 is 31323213.

It is not a de Polignac number, because 31232313 - 2¹² = 31228217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31232353) 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, 247813 + ... + 247938.

Almost surely, 2^31232313 is an apocalyptic number.

It is an amenable number.

31232313 is a deficient number, since it is larger than the sum of its proper divisors (20325895).

31232313 is a wasteful number, since it uses less digits than its factorization.

31232313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495764 (or 495761 counting only the distinct ones).

The product of its digits is 324, while the sum is 18.

The square root of 31232313 is about 5588.5877464705. The cubic root of 31232313 is about 314.9208266628.

Adding to 31232313 its reverse (31323213), we get a palindrome (62555526).

The spelling of 31232313 in words is "thirty-one million, two hundred thirty-two thousand, three hundred thirteen".