212304306 has 32 divisors (see below), whose sum is σ = 457371648. Its totient is φ = 65506320.

The previous prime is 212304293. The next prime is 212304317. The reversal of 212304306 is 603403212.

It is a happy number.

It is a super-2 number, since 2×212304306² = 90146236692283272, which contains 22 as substring.

It is an unprimeable number.

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, 20536 + ... + 29091.

It is an arithmetic number, because the mean of its divisors is an integer number (14292864).

Almost surely, 2^212304306 is an apocalyptic number.

212304306 is an abundant number, since it is smaller than the sum of its proper divisors (245067342).

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

212304306 is a wasteful number, since it uses less digits than its factorization.

212304306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49686.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 212304306 is about 14570.6659422279. The cubic root of 212304306 is about 596.5583573505.

Adding to 212304306 its reverse (603403212), we get a palindrome (815707518).

The spelling of 212304306 in words is "two hundred twelve million, three hundred four thousand, three hundred six".