212443406 has 8 divisors (see below), whose sum is σ = 364188720. Its totient is φ = 91047168.

The previous prime is 212443393. The next prime is 212443423. The reversal of 212443406 is 604344212.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7587251 + ... + 7587278.

It is an arithmetic number, because the mean of its divisors is an integer number (45523590).

Almost surely, 2^212443406 is an apocalyptic number.

212443406 is a deficient number, since it is larger than the sum of its proper divisors (151745314).

212443406 is a wasteful number, since it uses less digits than its factorization.

212443406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15174538.

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 212443406 is about 14575.4384496659. The cubic root of 212443406 is about 596.6886155834.

Adding to 212443406 its reverse (604344212), we get a palindrome (816787618).

The spelling of 212443406 in words is "two hundred twelve million, four hundred forty-three thousand, four hundred six".