212345220 has 48 divisors (see below), whose sum is σ = 610642368. Its totient is φ = 55094400.

The previous prime is 212345219. The next prime is 212345233. The reversal of 212345220 is 22543212.

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, 45606 + ... + 50045.

It is an arithmetic number, because the mean of its divisors is an integer number (12721716).

Almost surely, 2^212345220 is an apocalyptic number.

212345220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212345220 is an abundant number, since it is smaller than the sum of its proper divisors (398297148).

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

212345220 is a wasteful number, since it uses less digits than its factorization.

212345220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95700 (or 95698 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 212345220 is about 14572.0698598380. The cubic root of 212345220 is about 596.5966765935.

Adding to 212345220 its reverse (22543212), we get a palindrome (234888432).

The spelling of 212345220 in words is "two hundred twelve million, three hundred forty-five thousand, two hundred twenty".