865707488231 has 2 divisors, whose sum is σ = 865707488232. Its totient is φ = 865707488230.

The previous prime is 865707488143. The next prime is 865707488251. The reversal of 865707488231 is 132884707568.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 865707488231 - 2³⁰ = 864633746407 is a prime.

It is a super-2 number, since 2×865707488231² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (865707488251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432853744115 + 432853744116.

It is an arithmetic number, because the mean of its divisors is an integer number (432853744116).

Almost surely, 2^865707488231 is an apocalyptic number.

865707488231 is a deficient number, since it is larger than the sum of its proper divisors (1).

865707488231 is an equidigital number, since it uses as much as digits as its factorization.

865707488231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18063360, while the sum is 59.

The spelling of 865707488231 in words is "eight hundred sixty-five billion, seven hundred seven million, four hundred eighty-eight thousand, two hundred thirty-one".