31943190318813 has 32 divisors (see below), whose sum is σ = 47474194763520. Its totient is φ = 21227537505600.

The previous prime is 31943190318811. The next prime is 31943190318817. The reversal of 31943190318813 is 31881309134913.

31943190318813 is a `hidden beast` number, since 3 + 1 + 9 + 4 + 319 + 0 + 318 + 8 + 1 + 3 = 666.

It is not a de Polignac number, because 31943190318813 - 2¹ = 31943190318811 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31943190318813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31943190318811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 359065488 + ... + 359154438.

It is an arithmetic number, because the mean of its divisors is an integer number (1483568586360).

Almost surely, 2^{31943190318813} is an apocalyptic number.

It is an amenable number.

31943190318813 is a deficient number, since it is larger than the sum of its proper divisors (15531004444707).

31943190318813 is a wasteful number, since it uses less digits than its factorization.

31943190318813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131234 (or 131228 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 54.

The spelling of 31943190318813 in words is "thirty-one trillion, nine hundred forty-three billion, one hundred ninety million, three hundred eighteen thousand, eight hundred thirteen".