212344220 has 24 divisors (see below), whose sum is σ = 486461808. Its totient is φ = 77216000.

The previous prime is 212344219. The next prime is 212344241. The reversal of 212344220 is 22443212.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 212344192 and 212344201.

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 7 ways as a sum of consecutive naturals, for example, 482381 + ... + 482820.

It is an arithmetic number, because the mean of its divisors is an integer number (20269242).

Almost surely, 2^212344220 is an apocalyptic number.

212344220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212344220 is an abundant number, since it is smaller than the sum of its proper divisors (274117588).

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

212344220 is a wasteful number, since it uses less digits than its factorization.

212344220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 965221 (or 965219 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 212344220 is about 14572.0355475822. The cubic root of 212344220 is about 596.5957400720.

Adding to 212344220 its reverse (22443212), we get a palindrome (234787432).

The spelling of 212344220 in words is "two hundred twelve million, three hundred forty-four thousand, two hundred twenty".