868533221 has 4 divisors (see below), whose sum is σ = 888731712. Its totient is φ = 848334732.

The previous prime is 868533203. The next prime is 868533233. The reversal of 868533221 is 122335868.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 868533221 - 2⁶ = 868533157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (868533251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10099181 + ... + 10099266.

It is an arithmetic number, because the mean of its divisors is an integer number (222182928).

Almost surely, 2^868533221 is an apocalyptic number.

It is an amenable number.

868533221 is a deficient number, since it is larger than the sum of its proper divisors (20198491).

868533221 is a wasteful number, since it uses less digits than its factorization.

868533221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20198490.

The product of its digits is 69120, while the sum is 38.

The square root of 868533221 is about 29470.8876859860. The cubic root of 868533221 is about 954.1034763167.

The spelling of 868533221 in words is "eight hundred sixty-eight million, five hundred thirty-three thousand, two hundred twenty-one".