212816323 has 4 divisors (see below), whose sum is σ = 215813808. Its totient is φ = 209818840.

The previous prime is 212816299. The next prime is 212816339. The reversal of 212816323 is 323618212.

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

It is a cyclic number.

It is not a de Polignac number, because 212816323 - 2⁵ = 212816291 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212816291 and 212816300.

It is not an unprimeable number, because it can be changed into a prime (212816623) 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, 1498636 + ... + 1498777.

It is an arithmetic number, because the mean of its divisors is an integer number (53953452).

Almost surely, 2^212816323 is an apocalyptic number.

212816323 is a deficient number, since it is larger than the sum of its proper divisors (2997485).

212816323 is an equidigital number, since it uses as much as digits as its factorization.

212816323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2997484.

The product of its digits is 3456, while the sum is 28.

The square root of 212816323 is about 14588.2254918136. The cubic root of 212816323 is about 597.0375481305.

The spelling of 212816323 in words is "two hundred twelve million, eight hundred sixteen thousand, three hundred twenty-three".