212140228 has 12 divisors (see below), whose sum is σ = 372174012. Its totient is φ = 105804800.

The previous prime is 212140213. The next prime is 212140237. The reversal of 212140228 is 822041212.

It can be written as a sum of positive squares in 2 ways, for example, as 205979904 + 6160324 = 14352^2 + 2482^2 .

It is a junction number, because it is equal to n+sod(n) for n = 212140199 and 212140208.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64525 + ... + 67732.

It is an arithmetic number, because the mean of its divisors is an integer number (31014501).

Almost surely, 2^212140228 is an apocalyptic number.

It is an amenable number.

212140228 is a deficient number, since it is larger than the sum of its proper divisors (160033784).

212140228 is a wasteful number, since it uses less digits than its factorization.

212140228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132662 (or 132660 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

The square root of 212140228 is about 14565.0344318165. The cubic root of 212140228 is about 596.4046356625.

The spelling of 212140228 in words is "two hundred twelve million, one hundred forty thousand, two hundred twenty-eight".