31471948336 has 20 divisors (see below), whose sum is σ = 62464142664. Its totient is φ = 15352169600.

The previous prime is 31471948331. The next prime is 31471948337. The reversal of 31471948336 is 63384917413.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 31471948336.

It is not an unprimeable number, because it can be changed into a prime (31471948331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23987110 + ... + 23988421.

Almost surely, 2^31471948336 is an apocalyptic number.

It is an amenable number.

31471948336 is a deficient number, since it is larger than the sum of its proper divisors (30992194328).

31471948336 is a wasteful number, since it uses less digits than its factorization.

31471948336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47975580 (or 47975574 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 49.

The spelling of 31471948336 in words is "thirty-one billion, four hundred seventy-one million, nine hundred forty-eight thousand, three hundred thirty-six".