212543680 has 28 divisors (see below), whose sum is σ = 506120400. Its totient is φ = 85017344.

The previous prime is 212543677. The next prime is 212543689. The reversal of 212543680 is 86345212.

It is not an unprimeable number, because it can be changed into a prime (212543689) 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 3 ways as a sum of consecutive naturals, for example, 331780 + ... + 332419.

Almost surely, 2^212543680 is an apocalyptic number.

212543680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212543680 is an abundant number, since it is smaller than the sum of its proper divisors (293576720).

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

212543680 is an equidigital number, since it uses as much as digits as its factorization.

212543680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664216 (or 664206 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 212543680 is about 14578.8778717705. The cubic root of 212543680 is about 596.7824804925.

Adding to 212543680 its reverse (86345212), we get a palindrome (298888892).

The spelling of 212543680 in words is "two hundred twelve million, five hundred forty-three thousand, six hundred eighty".