820323213 has 8 divisors (see below), whose sum is σ = 1094709408. Its totient is φ = 546409584.

The previous prime is 820323199. The next prime is 820323299. The reversal of 820323213 is 312323028.

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

It is not a de Polignac number, because 820323213 - 2⁶ = 820323149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820323013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114070 + ... + 121047.

It is an arithmetic number, because the mean of its divisors is an integer number (136838676).

Almost surely, 2^820323213 is an apocalyptic number.

It is an amenable number.

820323213 is a deficient number, since it is larger than the sum of its proper divisors (274386195).

820323213 is a wasteful number, since it uses less digits than its factorization.

820323213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236283.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 820323213 is about 28641.2851143240. The cubic root of 820323213 is about 936.1131234723.

The spelling of 820323213 in words is "eight hundred twenty million, three hundred twenty-three thousand, two hundred thirteen".