212445616 has 10 divisors (see below), whose sum is σ = 411613412. Its totient is φ = 106222800.

The previous prime is 212445599. The next prime is 212445661. The reversal of 212445616 is 616544212.

It is a happy 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, 6638910 + ... + 6638941.

Almost surely, 2^212445616 is an apocalyptic number.

It is an amenable number.

212445616 is a deficient number, since it is larger than the sum of its proper divisors (199167796).

212445616 is a wasteful number, since it uses less digits than its factorization.

212445616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13277859 (or 13277853 counting only the distinct ones).

The product of its digits is 11520, while the sum is 31.

The square root of 212445616 is about 14575.5142619394. The cubic root of 212445616 is about 596.6906846478.

Adding to 212445616 its reverse (616544212), we get a palindrome (828989828).

The spelling of 212445616 in words is "two hundred twelve million, four hundred forty-five thousand, six hundred sixteen".