864221356 has 6 divisors (see below), whose sum is σ = 1512387380. Its totient is φ = 432110676.

The previous prime is 864221311. The next prime is 864221381. The reversal of 864221356 is 653122468.

864221356 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108027666 + ... + 108027673.

Almost surely, 2^864221356 is an apocalyptic number.

It is an amenable number.

864221356 is a deficient number, since it is larger than the sum of its proper divisors (648166024).

864221356 is a wasteful number, since it uses less digits than its factorization.

864221356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216055343 (or 216055341 counting only the distinct ones).

The product of its digits is 69120, while the sum is 37.

The square root of 864221356 is about 29397.6420142841. The cubic root of 864221356 is about 952.5219623716.

It can be divided in two parts, 86422 and 1356, that added together give a palindrome (87778).

The spelling of 864221356 in words is "eight hundred sixty-four million, two hundred twenty-one thousand, three hundred fifty-six".