865917222 has 8 divisors (see below), whose sum is σ = 1731834456. Its totient is φ = 288639072.

The previous prime is 865917209. The next prime is 865917263. The reversal of 865917222 is 222719568.

It is a sphenic number, since it is the product of 3 distinct primes.

865917222 is an admirable number.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72159763 + ... + 72159774.

It is an arithmetic number, because the mean of its divisors is an integer number (216479307).

Almost surely, 2^865917222 is an apocalyptic number.

865917222 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

865917222 is a wasteful number, since it uses less digits than its factorization.

865917222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144319542.

The product of its digits is 120960, while the sum is 42.

The square root of 865917222 is about 29426.4714500397. The cubic root of 865917222 is about 953.1446015240.

The spelling of 865917222 in words is "eight hundred sixty-five million, nine hundred seventeen thousand, two hundred twenty-two".