31481521704 has 48 divisors (see below), whose sum is σ = 85340392020. Its totient is φ = 10484248320.

The previous prime is 31481521697. The next prime is 31481521727. The reversal of 31481521704 is 40712518413.

31481521704 is a `hidden beast` number, since 3 + 1 + 481 + 5 + 2 + 170 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 30032196804 + 1449324900 = 173298^2 + 38070^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 120307 + ... + 278274.

Almost surely, 2^31481521704 is an apocalyptic number.

It is an amenable number.

31481521704 is an abundant number, since it is smaller than the sum of its proper divisors (53858870316).

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

31481521704 is a wasteful number, since it uses less digits than its factorization.

31481521704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399690 (or 399683 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The spelling of 31481521704 in words is "thirty-one billion, four hundred eighty-one million, five hundred twenty-one thousand, seven hundred four".