31312312 has 16 divisors (see below), whose sum is σ = 58824360. Its totient is φ = 15625824.

The previous prime is 31312301. The next prime is 31312327. The reversal of 31312312 is 21321313.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 943 + ... + 7969.

Almost surely, 2^31312312 is an apocalyptic number.

It is an amenable number.

31312312 is a deficient number, since it is larger than the sum of its proper divisors (27512048).

31312312 is a wasteful number, since it uses less digits than its factorization.

31312312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7590 (or 7586 counting only the distinct ones).

The product of its digits is 108, while the sum is 16.

The square root of 31312312 is about 5595.7405229335. The cubic root of 31312312 is about 315.1894786786.

Adding to 31312312 its reverse (21321313), we get a palindrome (52633625).

Subtracting from 31312312 its reverse (21321313), we obtain a palindrome (9990999).

The spelling of 31312312 in words is "thirty-one million, three hundred twelve thousand, three hundred twelve".