212233212 has 18 divisors (see below), whose sum is σ = 536478488. Its totient is φ = 70744392.

The previous prime is 212233193. The next prime is 212233237. The reversal of 212233212 is 212332212.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2947648 + ... + 2947719.

Almost surely, 2^212233212 is an apocalyptic number.

It is an amenable number.

212233212 is an abundant number, since it is smaller than the sum of its proper divisors (324245276).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212233212 is a wasteful number, since it uses less digits than its factorization.

212233212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5895377 (or 5895372 counting only the distinct ones).

The product of its digits is 288, while the sum is 18.

The square root of 212233212 is about 14568.2261102716. The cubic root of 212233212 is about 596.4917604050.

Adding to 212233212 its reverse (212332212), we get a palindrome (424565424).

The spelling of 212233212 in words is "two hundred twelve million, two hundred thirty-three thousand, two hundred twelve".