31312556740 has 24 divisors (see below), whose sum is σ = 65763593280. Its totient is φ = 12523646688.

The previous prime is 31312556701. The next prime is 31312556749. The reversal of 31312556740 is 4765521313.

It is a self number, because there is not a number n which added to its sum of digits gives 31312556740.

It is not an unprimeable number, because it can be changed into a prime (31312556749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111681 + ... + 274039.

It is an arithmetic number, because the mean of its divisors is an integer number (2740149720).

Almost surely, 2^31312556740 is an apocalyptic number.

It is an amenable number.

31312556740 is an abundant number, since it is smaller than the sum of its proper divisors (34451036540).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31312556740 is a wasteful number, since it uses less digits than its factorization.

31312556740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172011 (or 172009 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 37.

The spelling of 31312556740 in words is "thirty-one billion, three hundred twelve million, five hundred fifty-six thousand, seven hundred forty".