831863472820531 has 16 divisors (see below), whose sum is σ = 882471285732960. Its totient is φ = 782798219320320.

The previous prime is 831863472820489. The next prime is 831863472820571. The reversal of 831863472820531 is 135028274368138.

831863472820531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 831863472820531 - 2²⁵ = 831863439266099 is a prime.

It is a super-2 number, since 2×831863472820531² (a number of 31 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 831863472820531.

It is not an unprimeable number, because it can be changed into a prime (831863472820571) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 722952030 + ... + 724101763.

It is an arithmetic number, because the mean of its divisors is an integer number (55154455358310).

Almost surely, 2^{831863472820531} is an apocalyptic number.

831863472820531 is a deficient number, since it is larger than the sum of its proper divisors (50607812912429).

831863472820531 is a wasteful number, since it uses less digits than its factorization.

831863472820531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1447054326.

The product of its (nonzero) digits is 46448640, while the sum is 61.

The spelling of 831863472820531 in words is "eight hundred thirty-one trillion, eight hundred sixty-three billion, four hundred seventy-two million, eight hundred twenty thousand, five hundred thirty-one".