31430545521543 has 48 divisors (see below), whose sum is σ = 51935638497600. Its totient is φ = 17942908907520.

The previous prime is 31430545521539. The next prime is 31430545521569. The reversal of 31430545521543 is 34512554503413.

31430545521543 is a `hidden beast` number, since 3 + 1 + 4 + 3 + 0 + 54 + 5 + 52 + 1 + 543 = 666.

It is not a de Polignac number, because 31430545521543 - 2² = 31430545521539 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31430545521443) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 373113753 + ... + 373197981.

It is an arithmetic number, because the mean of its divisors is an integer number (1081992468700).

Almost surely, 2^{31430545521543} is an apocalyptic number.

31430545521543 is a deficient number, since it is larger than the sum of its proper divisors (20505092976057).

31430545521543 is a wasteful number, since it uses less digits than its factorization.

31430545521543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89912 (or 89909 counting only the distinct ones).

The product of its (nonzero) digits is 2160000, while the sum is 45.

The spelling of 31430545521543 in words is "thirty-one trillion, four hundred thirty billion, five hundred forty-five million, five hundred twenty-one thousand, five hundred forty-three".