213043212 has 36 divisors (see below), whose sum is σ = 539263816. Its totient is φ = 70917120.

The previous prime is 213043189. The next prime is 213043213. The reversal of 213043212 is 212340312.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213043213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25548 + ... + 32844.

Almost surely, 2^213043212 is an apocalyptic number.

It is an amenable number.

213043212 is an abundant number, since it is smaller than the sum of its proper divisors (326220604).

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

213043212 is a wasteful number, since it uses less digits than its factorization.

213043212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8118 (or 8113 counting only the distinct ones).

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

The square root of 213043212 is about 14595.9998629762. Note that the first 3 decimals coincide. The cubic root of 213043212 is about 597.2496451777.

Adding to 213043212 its reverse (212340312), we get a palindrome (425383524).

The spelling of 213043212 in words is "two hundred thirteen million, forty-three thousand, two hundred twelve".