212643633 has 16 divisors (see below), whose sum is σ = 300741120. Its totient is φ = 133184256.

The previous prime is 212643619. The next prime is 212643637. The reversal of 212643633 is 336346212.

It is not a de Polignac number, because 212643633 - 2⁶ = 212643569 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 212643633.

It is not an unprimeable number, because it can be changed into a prime (212643637) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27523 + ... + 34391.

It is an arithmetic number, because the mean of its divisors is an integer number (18796320).

Almost surely, 2^212643633 is an apocalyptic number.

It is an amenable number.

212643633 is a deficient number, since it is larger than the sum of its proper divisors (88097487).

212643633 is a wasteful number, since it uses less digits than its factorization.

212643633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7496.

The product of its digits is 15552, while the sum is 30.

The square root of 212643633 is about 14582.3054761584. The cubic root of 212643633 is about 596.8760155424.

Adding to 212643633 its reverse (336346212), we get a palindrome (548989845).

The spelling of 212643633 in words is "two hundred twelve million, six hundred forty-three thousand, six hundred thirty-three".