212243313 has 16 divisors (see below), whose sum is σ = 290442240. Its totient is φ = 137789904.

The previous prime is 212243309. The next prime is 212243321. The reversal of 212243313 is 313342212.

212243313 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 212243313 - 2² = 212243309 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212243313.

It is not an unprimeable number, because it can be changed into a prime (212243363) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44020 + ... + 48602.

It is an arithmetic number, because the mean of its divisors is an integer number (18152640).

Almost surely, 2^212243313 is an apocalyptic number.

It is an amenable number.

212243313 is a deficient number, since it is larger than the sum of its proper divisors (78198927).

212243313 is a wasteful number, since it uses less digits than its factorization.

212243313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4988.

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

The square root of 212243313 is about 14568.5727852800. The cubic root of 212243313 is about 596.5012233721.

Adding to 212243313 its reverse (313342212), we get a palindrome (525585525).

The spelling of 212243313 in words is "two hundred twelve million, two hundred forty-three thousand, three hundred thirteen".