212304311 has 4 divisors (see below), whose sum is σ = 216821472. Its totient is φ = 207787152.

The previous prime is 212304293. The next prime is 212304317. The reversal of 212304311 is 113403212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 212304311 - 2¹⁴ = 212287927 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212304311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212304317) 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, 2258510 + ... + 2258603.

It is an arithmetic number, because the mean of its divisors is an integer number (54205368).

Almost surely, 2^212304311 is an apocalyptic number.

212304311 is a deficient number, since it is larger than the sum of its proper divisors (4517161).

212304311 is an equidigital number, since it uses as much as digits as its factorization.

212304311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4517160.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 212304311 is about 14570.6661138055. Note that the first 3 decimals coincide. The cubic root of 212304311 is about 596.5583620337.

Adding to 212304311 its reverse (113403212), we get a palindrome (325707523).

The spelling of 212304311 in words is "two hundred twelve million, three hundred four thousand, three hundred eleven".