861144222 has 8 divisors (see below), whose sum is σ = 1722288456. Its totient is φ = 287048072.

The previous prime is 861144217. The next prime is 861144247. The reversal of 861144222 is 222441168.

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

861144222 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 861144222.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71762013 + ... + 71762024.

It is an arithmetic number, because the mean of its divisors is an integer number (215286057).

Almost surely, 2^861144222 is an apocalyptic number.

861144222 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.

861144222 is a wasteful number, since it uses less digits than its factorization.

861144222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143524042.

The product of its digits is 6144, while the sum is 30.

The square root of 861144222 is about 29345.2589356441. The cubic root of 861144222 is about 951.3901059978.

The spelling of 861144222 in words is "eight hundred sixty-one million, one hundred forty-four thousand, two hundred twenty-two".