212228 has 12 divisors (see below), whose sum is σ = 393372. Its totient is φ = 99840.

The previous prime is 212227. The next prime is 212239. The reversal of 212228 is 822212.

It can be written as a sum of positive squares in 2 ways, for example, as 58564 + 153664 = 242^2 + 392^2 .

It is a hoax number, since the sum of its digits (17) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is not an unprimeable number, because it can be changed into a prime (212227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1493 + ... + 1628.

It is an arithmetic number, because the mean of its divisors is an integer number (32781).

2²¹²²²⁸ is an apocalyptic number.

It is an amenable number.

212228 is a deficient number, since it is larger than the sum of its proper divisors (181144).

212228 is a wasteful number, since it uses less digits than its factorization.

212228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3142 (or 3140 counting only the distinct ones).

The product of its digits is 128, while the sum is 17.

The square root of 212228 is about 460.6821029734. The cubic root of 212228 is about 59.6486877505.

The spelling of 212228 in words is "two hundred twelve thousand, two hundred twenty-eight".