31728574443143 has 2 divisors, whose sum is σ = 31728574443144. Its totient is φ = 31728574443142.

The previous prime is 31728574443119. The next prime is 31728574443193. The reversal of 31728574443143 is 34134447582713.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31728574443143 - 2¹⁰ = 31728574442119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31728574443193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15864287221571 + 15864287221572.

It is an arithmetic number, because the mean of its divisors is an integer number (15864287221572).

Almost surely, 2^{31728574443143} is an apocalyptic number.

31728574443143 is a deficient number, since it is larger than the sum of its proper divisors (1).

31728574443143 is an equidigital number, since it uses as much as digits as its factorization.

31728574443143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27095040, while the sum is 56.

The spelling of 31728574443143 in words is "thirty-one trillion, seven hundred twenty-eight billion, five hundred seventy-four million, four hundred forty-three thousand, one hundred forty-three".