819781460231 has 2 divisors, whose sum is σ = 819781460232. Its totient is φ = 819781460230.

The previous prime is 819781460189. The next prime is 819781460341. The reversal of 819781460231 is 132064187918.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 819781460231 - 2¹⁰ = 819781459207 is a prime.

It is a super-2 number, since 2×819781460231² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 819781460231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (819781420231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 409890730115 + 409890730116.

It is an arithmetic number, because the mean of its divisors is an integer number (409890730116).

Almost surely, 2^819781460231 is an apocalyptic number.

819781460231 is a deficient number, since it is larger than the sum of its proper divisors (1).

819781460231 is an equidigital number, since it uses as much as digits as its factorization.

819781460231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 580608, while the sum is 50.

The spelling of 819781460231 in words is "eight hundred nineteen billion, seven hundred eighty-one million, four hundred sixty thousand, two hundred thirty-one".