212443020 has 48 divisors (see below), whose sum is σ = 660935520. Its totient is φ = 56651328.

The previous prime is 212443001. The next prime is 212443057. The reversal of 212443020 is 20344212.

212443020 is a `hidden beast` number, since 212 + 4 + 430 + 20 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 212442984 and 212443002.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 196167 + ... + 197246.

It is an arithmetic number, because the mean of its divisors is an integer number (13769490).

Almost surely, 2^212443020 is an apocalyptic number.

212443020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212443020 is an abundant number, since it is smaller than the sum of its proper divisors (448492500).

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

212443020 is a wasteful number, since it uses less digits than its factorization.

212443020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393431 (or 393423 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 212443020 is about 14575.4252082058. The cubic root of 212443020 is about 596.6882541978.

Adding to 212443020 its reverse (20344212), we get a palindrome (232787232).

The spelling of 212443020 in words is "two hundred twelve million, four hundred forty-three thousand, twenty".