212136634 has 16 divisors (see below), whose sum is σ = 341275680. Its totient is φ = 98588880.

The previous prime is 212136607. The next prime is 212136641. The reversal of 212136634 is 436631212.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50652 + ... + 54679.

It is an arithmetic number, because the mean of its divisors is an integer number (21329730).

Almost surely, 2^212136634 is an apocalyptic number.

212136634 is a deficient number, since it is larger than the sum of its proper divisors (129139046).

212136634 is a wasteful number, since it uses less digits than its factorization.

212136634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105405.

The product of its digits is 5184, while the sum is 28.

The square root of 212136634 is about 14564.9110536247. The cubic root of 212136634 is about 596.4012676224.

Adding to 212136634 its reverse (436631212), we get a palindrome (648767846).

The spelling of 212136634 in words is "two hundred twelve million, one hundred thirty-six thousand, six hundred thirty-four".