212822228 has 6 divisors (see below), whose sum is σ = 372438906. Its totient is φ = 106411112.

The previous prime is 212822221. The next prime is 212822257. The reversal of 212822228 is 822228212.

It can be written as a sum of positive squares in only one way, i.e., 116035984 + 96786244 = 10772^2 + 9838^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 212822228.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212822221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26602775 + ... + 26602782.

It is an arithmetic number, because the mean of its divisors is an integer number (62073151).

Almost surely, 2^212822228 is an apocalyptic number.

It is an amenable number.

212822228 is a deficient number, since it is larger than the sum of its proper divisors (159616678).

212822228 is a wasteful number, since it uses less digits than its factorization.

212822228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53205561 (or 53205559 counting only the distinct ones).

The product of its digits is 4096, while the sum is 29.

The square root of 212822228 is about 14588.4278796586. The cubic root of 212822228 is about 597.0430700661.

The spelling of 212822228 in words is "two hundred twelve million, eight hundred twenty-two thousand, two hundred twenty-eight".