212128624 has 10 divisors (see below), whose sum is σ = 410999240. Its totient is φ = 106064304.

The previous prime is 212128619. The next prime is 212128687. The reversal of 212128624 is 426821212.

212128624 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 212128592 and 212128601.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 6629004 + ... + 6629035.

It is an arithmetic number, because the mean of its divisors is an integer number (41099924).

Almost surely, 2^212128624 is an apocalyptic number.

It is an amenable number.

212128624 is a deficient number, since it is larger than the sum of its proper divisors (198870616).

212128624 is a wasteful number, since it uses less digits than its factorization.

212128624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13258047 (or 13258041 counting only the distinct ones).

The product of its digits is 3072, while the sum is 28.

The square root of 212128624 is about 14564.6360750964. The cubic root of 212128624 is about 596.3937610857.

Adding to 212128624 its reverse (426821212), we get a palindrome (638949836).

The spelling of 212128624 in words is "two hundred twelve million, one hundred twenty-eight thousand, six hundred twenty-four".