864222529 has 4 divisors (see below), whose sum is σ = 864588484. Its totient is φ = 863856576.

The previous prime is 864222521. The next prime is 864222547. The reversal of 864222529 is 925222468.

864222529 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 231800625 + 632421904 = 15225^2 + 25148^2 .

It is a cyclic number.

It is not a de Polignac number, because 864222529 - 2³ = 864222521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 864222491 and 864222500.

It is not an unprimeable number, because it can be changed into a prime (864222521) 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, 179412 + ... + 184165.

It is an arithmetic number, because the mean of its divisors is an integer number (216147121).

Almost surely, 2^864222529 is an apocalyptic number.

It is an amenable number.

864222529 is a deficient number, since it is larger than the sum of its proper divisors (365955).

864222529 is a wasteful number, since it uses less digits than its factorization.

864222529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365954.

The product of its digits is 138240, while the sum is 40.

The square root of 864222529 is about 29397.6619648570. The cubic root of 864222529 is about 952.5223933213.

The spelling of 864222529 in words is "eight hundred sixty-four million, two hundred twenty-two thousand, five hundred twenty-nine".