831587048321 has 2 divisors, whose sum is σ = 831587048322. Its totient is φ = 831587048320.

The previous prime is 831587048309. The next prime is 831587048371. The reversal of 831587048321 is 123840785138.

831587048321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (831587048371) can be obtained adding 831587048321 to its sum of digits (50).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 474843649921 + 356743398400 = 689089^2 + 597280^2 .

It is a cyclic number.

It is not a de Polignac number, because 831587048321 - 2²² = 831582854017 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 831587048321.

It is not a weakly prime, because it can be changed into another prime (831587048371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 415793524160 + 415793524161.

It is an arithmetic number, because the mean of its divisors is an integer number (415793524161).

Almost surely, 2^831587048321 is an apocalyptic number.

It is an amenable number.

831587048321 is a deficient number, since it is larger than the sum of its proper divisors (1).

831587048321 is an equidigital number, since it uses as much as digits as its factorization.

831587048321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1290240, while the sum is 50.

The spelling of 831587048321 in words is "eight hundred thirty-one billion, five hundred eighty-seven million, forty-eight thousand, three hundred twenty-one".