31431489177393 has 12 divisors (see below), whose sum is σ = 45477601549380. Its totient is φ = 20918989982976.

The previous prime is 31431489177323. The next prime is 31431489177401. The reversal of 31431489177393 is 39377198413413.

31431489177393 is a `hidden beast` number, since 3 + 1 + 4 + 31 + 48 + 9 + 177 + 393 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 10362810833424 + 21068678343969 = 3219132^2 + 4590063^2 .

It is not a de Polignac number, because 31431489177393 - 2²¹ = 31431487080241 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31431489177393.

It is not an unprimeable number, because it can be changed into a prime (31431489177323) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2944672308 + ... + 2944682981.

It is an arithmetic number, because the mean of its divisors is an integer number (3789800129115).

Almost surely, 2^{31431489177393} is an apocalyptic number.

It is an amenable number.

31431489177393 is a deficient number, since it is larger than the sum of its proper divisors (14046112371987).

31431489177393 is a wasteful number, since it uses less digits than its factorization.

31431489177393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5889355888 (or 5889355885 counting only the distinct ones).

The product of its digits is 41150592, while the sum is 63.

The spelling of 31431489177393 in words is "thirty-one trillion, four hundred thirty-one billion, four hundred eighty-nine million, one hundred seventy-seven thousand, three hundred ninety-three".