865495255 has 4 divisors (see below), whose sum is σ = 1038594312. Its totient is φ = 692396200.

The previous prime is 865495243. The next prime is 865495259. The reversal of 865495255 is 552594568.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 865495255 - 2⁹ = 865494743 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 865495199 and 865495208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (865495259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86549521 + ... + 86549530.

It is an arithmetic number, because the mean of its divisors is an integer number (259648578).

Almost surely, 2^865495255 is an apocalyptic number.

865495255 is a deficient number, since it is larger than the sum of its proper divisors (173099057).

865495255 is a wasteful number, since it uses less digits than its factorization.

865495255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173099056.

The product of its digits is 2160000, while the sum is 49.

The square root of 865495255 is about 29419.3007224849. The cubic root of 865495255 is about 952.9897518815.

The spelling of 865495255 in words is "eight hundred sixty-five million, four hundred ninety-five thousand, two hundred fifty-five".