31573371823543 has 4 divisors (see below), whose sum is σ = 34443678352968. Its totient is φ = 28703065294120.

The previous prime is 31573371823507. The next prime is 31573371823577. The reversal of 31573371823543 is 34532817337513.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31573371823543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31573371823243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1435153264696 + ... + 1435153264717.

It is an arithmetic number, because the mean of its divisors is an integer number (8610919588242).

Almost surely, 2^{31573371823543} is an apocalyptic number.

31573371823543 is a deficient number, since it is larger than the sum of its proper divisors (2870306529425).

31573371823543 is a wasteful number, since it uses less digits than its factorization.

31573371823543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2870306529424.

The product of its digits is 19051200, while the sum is 55.

The spelling of 31573371823543 in words is "thirty-one trillion, five hundred seventy-three billion, three hundred seventy-one million, eight hundred twenty-three thousand, five hundred forty-three".