816229 has 4 divisors (see below), whose sum is σ = 822784. Its totient is φ = 809676.

The previous prime is 816227. The next prime is 816239. The reversal of 816229 is 922618.

It is a happy number.

816229 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, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 922618 = 2 ⋅461309.

It is a cyclic number.

It is not a de Polignac number, because 816229 - 2¹ = 816227 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 816197 and 816206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816223) 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, 3087 + ... + 3340.

It is an arithmetic number, because the mean of its divisors is an integer number (205696).

2⁸¹⁶²²⁹ is an apocalyptic number.

It is an amenable number.

816229 is a deficient number, since it is larger than the sum of its proper divisors (6555).

816229 is a wasteful number, since it uses less digits than its factorization.

816229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6554.

The product of its digits is 1728, while the sum is 28.

The square root of 816229 is about 903.4539279897. The cubic root of 816229 is about 93.4553152796.

The spelling of 816229 in words is "eight hundred sixteen thousand, two hundred twenty-nine".