31318648 has 16 divisors (see below), whose sum is σ = 58860000. Its totient is φ = 15622656.

The previous prime is 31318621. The next prime is 31318691. The reversal of 31318648 is 84681313.

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, 768 + ... + 7951.

It is an arithmetic number, because the mean of its divisors is an integer number (3678750).

Almost surely, 2^31318648 is an apocalyptic number.

It is an amenable number.

31318648 is a deficient number, since it is larger than the sum of its proper divisors (27541352).

31318648 is a wasteful number, since it uses less digits than its factorization.

31318648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9174 (or 9170 counting only the distinct ones).

The product of its digits is 13824, while the sum is 34.

The square root of 31318648 is about 5596.3066392041. The cubic root of 31318648 is about 315.2107366197.

The spelling of 31318648 in words is "thirty-one million, three hundred eighteen thousand, six hundred forty-eight".