212543252 has 12 divisors (see below), whose sum is σ = 378255360. Its totient is φ = 104470296.

The previous prime is 212543251. The next prime is 212543269. The reversal of 212543252 is 252345212.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212543251) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 450068 + ... + 450539.

It is an arithmetic number, because the mean of its divisors is an integer number (31521280).

Almost surely, 2^212543252 is an apocalyptic number.

It is an amenable number.

212543252 is a deficient number, since it is larger than the sum of its proper divisors (165712108).

212543252 is a wasteful number, since it uses less digits than its factorization.

212543252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 900670 (or 900668 counting only the distinct ones).

The product of its digits is 4800, while the sum is 26.

The square root of 212543252 is about 14578.8631929928. The cubic root of 212543252 is about 596.7820799112.

Adding to 212543252 its reverse (252345212), we get a palindrome (464888464).

The spelling of 212543252 in words is "two hundred twelve million, five hundred forty-three thousand, two hundred fifty-two".