212304666 has 32 divisors (see below), whose sum is σ = 486073728. Its totient is φ = 60557760.

The previous prime is 212304661. The next prime is 212304667. The reversal of 212304666 is 666403212.

It is not an unprimeable number, because it can be changed into a prime (212304661) 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 15 ways as a sum of consecutive naturals, for example, 23556 + ... + 31296.

It is an arithmetic number, because the mean of its divisors is an integer number (15189804).

Almost surely, 2^212304666 is an apocalyptic number.

212304666 is an abundant number, since it is smaller than the sum of its proper divisors (273769062).

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

212304666 is a wasteful number, since it uses less digits than its factorization.

212304666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8406.

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 212304666 is about 14570.6782958104. The cubic root of 212304666 is about 596.5586945408.

Adding to 212304666 its reverse (666403212), we get a palindrome (878707878).

The spelling of 212304666 in words is "two hundred twelve million, three hundred four thousand, six hundred sixty-six".