2531581668343 has 12 divisors (see below), whose sum is σ = 3171431980920. Its totient is φ = 2003009671152.

The previous prime is 2531581668311. The next prime is 2531581668377. The reversal of 2531581668343 is 3438661851352.

It is not a de Polignac number, because 2531581668343 - 2⁵ = 2531581668311 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2531581668043) 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, 1987112133 + ... + 1987113406.

It is an arithmetic number, because the mean of its divisors is an integer number (264285998410).

Almost surely, 2^{2531581668343} is an apocalyptic number.

2531581668343 is a deficient number, since it is larger than the sum of its proper divisors (639850312577).

2531581668343 is a wasteful number, since it uses less digits than its factorization.

2531581668343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3974225566 (or 3974225559 counting only the distinct ones).

The product of its digits is 12441600, while the sum is 55.

The spelling of 2531581668343 in words is "two trillion, five hundred thirty-one billion, five hundred eighty-one million, six hundred sixty-eight thousand, three hundred forty-three".