2160865556231 has 2 divisors, whose sum is σ = 2160865556232. Its totient is φ = 2160865556230.

The previous prime is 2160865556221. The next prime is 2160865556321. The reversal of 2160865556231 is 1326555680612.

Together with next prime (2160865556321) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2160865556231 is a prime.

It is a super-2 number, since 2×2160865556231² (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 2160865556231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2160865556221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1080432778115 + 1080432778116.

It is an arithmetic number, because the mean of its divisors is an integer number (1080432778116).

Almost surely, 2^{2160865556231} is an apocalyptic number.

2160865556231 is a deficient number, since it is larger than the sum of its proper divisors (1).

2160865556231 is an equidigital number, since it uses as much as digits as its factorization.

2160865556231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592000, while the sum is 50.

The spelling of 2160865556231 in words is "two trillion, one hundred sixty billion, eight hundred sixty-five million, five hundred fifty-six thousand, two hundred thirty-one".