212066823 has 8 divisors (see below), whose sum is σ = 299388528. Its totient is φ = 133061504.

The previous prime is 212066819. The next prime is 212066839. The reversal of 212066823 is 328660212.

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 212066823 - 2² = 212066819 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212066843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2079036 + ... + 2079137.

It is an arithmetic number, because the mean of its divisors is an integer number (37423566).

Almost surely, 2^212066823 is an apocalyptic number.

212066823 is a deficient number, since it is larger than the sum of its proper divisors (87321705).

212066823 is a wasteful number, since it uses less digits than its factorization.

212066823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4158193.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 212066823 is about 14562.5143090058. The cubic root of 212066823 is about 596.3358381928.

The spelling of 212066823 in words is "two hundred twelve million, sixty-six thousand, eight hundred twenty-three".