212423223 has 4 divisors (see below), whose sum is σ = 283230968. Its totient is φ = 141615480.

The previous prime is 212423219. The next prime is 212423227. The reversal of 212423223 is 322324212.

212423223 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 is an interprime number because it is at equal distance from previous prime (212423219) and next prime (212423227).

It is not a de Polignac number, because 212423223 - 2² = 212423219 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212423223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212423227) 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, 35403868 + ... + 35403873.

It is an arithmetic number, because the mean of its divisors is an integer number (70807742).

Almost surely, 2^212423223 is an apocalyptic number.

212423223 is a deficient number, since it is larger than the sum of its proper divisors (70807745).

212423223 is an equidigital number, since it uses as much as digits as its factorization.

212423223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70807744.

The product of its digits is 1152, while the sum is 21.

The square root of 212423223 is about 14574.7460698291. The cubic root of 212423223 is about 596.6697190249.

Adding to 212423223 its reverse (322324212), we get a palindrome (534747435).

The spelling of 212423223 in words is "two hundred twelve million, four hundred twenty-three thousand, two hundred twenty-three".