212210284 has 72 divisors (see below), whose sum is σ = 455147280. Its totient is φ = 85895040.

The previous prime is 212210249. The next prime is 212210293. The reversal of 212210284 is 482012212.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 181887 + ... + 183049.

It is an arithmetic number, because the mean of its divisors is an integer number (6321490).

Almost surely, 2^212210284 is an apocalyptic number.

It is an amenable number.

212210284 is an abundant number, since it is smaller than the sum of its proper divisors (242936996).

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

212210284 is a wasteful number, since it uses less digits than its factorization.

212210284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1231 (or 1218 counting only the distinct ones).

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

The square root of 212210284 is about 14567.4391709731. The cubic root of 212210284 is about 596.4702795452.

Adding to 212210284 its reverse (482012212), we get a palindrome (694222496).

The spelling of 212210284 in words is "two hundred twelve million, two hundred ten thousand, two hundred eighty-four".