865222875 has 96 divisors (see below), whose sum is σ = 1717148160. Its totient is φ = 415656000.

The previous prime is 865222873. The next prime is 865222889. The reversal of 865222875 is 578222568.

It is not a de Polignac number, because 865222875 - 2¹ = 865222873 is a prime.

It is a super-2 number, since 2×865222875² = 1497221246846531250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 865222875.

It is not an unprimeable number, because it can be changed into a prime (865222873) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1719874 + ... + 1720376.

It is an arithmetic number, because the mean of its divisors is an integer number (17886960).

Almost surely, 2^865222875 is an apocalyptic number.

865222875 is a deficient number, since it is larger than the sum of its proper divisors (851925285).

865222875 is a wasteful number, since it uses less digits than its factorization.

865222875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 674 (or 661 counting only the distinct ones).

The product of its digits is 537600, while the sum is 45.

The square root of 865222875 is about 29414.6710843416. The cubic root of 865222875 is about 952.8897695950.

The spelling of 865222875 in words is "eight hundred sixty-five million, two hundred twenty-two thousand, eight hundred seventy-five".