831116543 has 4 divisors (see below), whose sum is σ = 831309960. Its totient is φ = 830923128.

The previous prime is 831116509. The next prime is 831116549. The reversal of 831116543 is 345611138.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 345611138 = 2 ⋅172805569.

It is a cyclic number.

It is not a de Polignac number, because 831116543 - 2¹⁴ = 831100159 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 (831116549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90113 + ... + 98906.

It is an arithmetic number, because the mean of its divisors is an integer number (207827490).

Almost surely, 2^831116543 is an apocalyptic number.

831116543 is a deficient number, since it is larger than the sum of its proper divisors (193417).

831116543 is a wasteful number, since it uses less digits than its factorization.

831116543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193416.

The product of its digits is 8640, while the sum is 32.

The square root of 831116543 is about 28829.0919558699. The cubic root of 831116543 is about 940.2008560526.

The spelling of 831116543 in words is "eight hundred thirty-one million, one hundred sixteen thousand, five hundred forty-three".