212340213 has 6 divisors (see below), whose sum is σ = 306713654. Its totient is φ = 141560136.

The previous prime is 212340187. The next prime is 212340241. The reversal of 212340213 is 312043212.

212340213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 212051844 + 288369 = 14562^2 + 537^2 .

It is not a de Polignac number, because 212340213 - 2²⁶ = 145231349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212340253) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11796670 + ... + 11796687.

Almost surely, 2^212340213 is an apocalyptic number.

It is an amenable number.

212340213 is a deficient number, since it is larger than the sum of its proper divisors (94373441).

212340213 is a wasteful number, since it uses less digits than its factorization.

212340213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23593363 (or 23593360 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 212340213 is about 14571.8980575627. The cubic root of 212340213 is about 596.5919874007.

Adding to 212340213 its reverse (312043212), we get a palindrome (524383425).

The spelling of 212340213 in words is "two hundred twelve million, three hundred forty thousand, two hundred thirteen".