864524221 has 8 divisors (see below), whose sum is σ = 944799264. Its totient is φ = 784529520.

The previous prime is 864524209. The next prime is 864524233. The reversal of 864524221 is 122425468.

It is an interprime number because it is at equal distance from previous prime (864524209) and next prime (864524233).

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

It is a cyclic number.

It is not a de Polignac number, because 864524221 - 2⁷ = 864524093 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 (864524281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63606 + ... + 75991.

It is an arithmetic number, because the mean of its divisors is an integer number (118099908).

Almost surely, 2^864524221 is an apocalyptic number.

It is an amenable number.

864524221 is a deficient number, since it is larger than the sum of its proper divisors (80275043).

864524221 is a wasteful number, since it uses less digits than its factorization.

864524221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140171.

The product of its digits is 30720, while the sum is 34.

The square root of 864524221 is about 29402.7927415067. The cubic root of 864524221 is about 952.6332193117.

Adding to 864524221 its reverse (122425468), we get a palindrome (986949689).

The spelling of 864524221 in words is "eight hundred sixty-four million, five hundred twenty-four thousand, two hundred twenty-one".