212134284 has 18 divisors (see below), whose sum is σ = 536228420. Its totient is φ = 70711416.

The previous prime is 212134243. The next prime is 212134289. The reversal of 212134284 is 482431212.

212134284 is a `hidden beast` number, since 21 + 213 + 428 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (212134289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2946274 + ... + 2946345.

Almost surely, 2^212134284 is an apocalyptic number.

It is an amenable number.

212134284 is an abundant number, since it is smaller than the sum of its proper divisors (324094136).

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

212134284 is a wasteful number, since it uses less digits than its factorization.

212134284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5892629 (or 5892624 counting only the distinct ones).

The product of its digits is 3072, while the sum is 27.

The square root of 212134284 is about 14564.8303800628. The cubic root of 212134284 is about 596.3990653497.

Subtracting from 212134284 its product of digits (3072), we obtain a palindrome (212131212).

Adding to 212134284 its reverse (482431212), we get a palindrome (694565496).

The spelling of 212134284 in words is "two hundred twelve million, one hundred thirty-four thousand, two hundred eighty-four".