31812711047 has 8 divisors (see below), whose sum is σ = 36062992560. Its totient is φ = 27820022400.

The previous prime is 31812710893. The next prime is 31812711053. The reversal of 31812711047 is 74011721813.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31812711047 - 2⁸ = 31812710791 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31812710998 and 31812711016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31812711647) 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, 64397954 + ... + 64398447.

It is an arithmetic number, because the mean of its divisors is an integer number (4507874070).

Almost surely, 2^31812711047 is an apocalyptic number.

31812711047 is a deficient number, since it is larger than the sum of its proper divisors (4250281513).

31812711047 is a wasteful number, since it uses less digits than its factorization.

31812711047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128796433.

The product of its (nonzero) digits is 9408, while the sum is 35.

The spelling of 31812711047 in words is "thirty-one billion, eight hundred twelve million, seven hundred eleven thousand, forty-seven".