212543424 has 84 divisors (see below), whose sum is σ = 641314440. Its totient is φ = 67115520.

The previous prime is 212543411. The next prime is 212543431. The reversal of 212543424 is 424345212.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 1234 + ... + 20654.

Almost surely, 2^212543424 is an apocalyptic number.

212543424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212543424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (320657220).

212543424 is an abundant number, since it is smaller than the sum of its proper divisors (428771016).

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

212543424 is a wasteful number, since it uses less digits than its factorization.

212543424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19458 (or 19445 counting only the distinct ones).

The product of its digits is 7680, while the sum is 27.

The square root of 212543424 is about 14578.8690919426. The cubic root of 212543424 is about 596.7822408926.

Adding to 212543424 its reverse (424345212), we get a palindrome (636888636).

The spelling of 212543424 in words is "two hundred twelve million, five hundred forty-three thousand, four hundred twenty-four".