31371502648 has 32 divisors (see below), whose sum is σ = 61459120800. Its totient is φ = 14984183808.

The previous prime is 31371502633. The next prime is 31371502649. The reversal of 31371502648 is 84620517313.

It is a self number, because there is not a number n which added to its sum of digits gives 31371502648.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31371502649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30640 + ... + 252352.

It is an arithmetic number, because the mean of its divisors is an integer number (1920597525).

Almost surely, 2^31371502648 is an apocalyptic number.

It is an amenable number.

31371502648 is a deficient number, since it is larger than the sum of its proper divisors (30087618152).

31371502648 is a wasteful number, since it uses less digits than its factorization.

31371502648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222511 (or 222507 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 40.

The spelling of 31371502648 in words is "thirty-one billion, three hundred seventy-one million, five hundred two thousand, six hundred forty-eight".