212543412 has 24 divisors (see below), whose sum is σ = 501912096. Its totient is φ = 69993888.

The previous prime is 212543411. The next prime is 212543431. The reversal of 212543412 is 214345212.

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 (212543411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105703 + ... + 107694.

It is an arithmetic number, because the mean of its divisors is an integer number (20913004).

Almost surely, 2^212543412 is an apocalyptic number.

It is an amenable number.

212543412 is an abundant number, since it is smaller than the sum of its proper divisors (289368684).

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

212543412 is a wasteful number, since it uses less digits than its factorization.

212543412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213487 (or 213485 counting only the distinct ones).

The product of its digits is 1920, while the sum is 24.

The square root of 212543412 is about 14578.8686803881. The cubic root of 212543412 is about 596.7822296613.

Adding to 212543412 its reverse (214345212), we get a palindrome (426888624).

The spelling of 212543412 in words is "two hundred twelve million, five hundred forty-three thousand, four hundred twelve".