212440213 has 4 divisors (see below), whose sum is σ = 221676768. Its totient is φ = 203203660.

The previous prime is 212440201. The next prime is 212440219. The reversal of 212440213 is 312044212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 212440213 - 2¹³ = 212432021 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 (212440219) 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 3 ways as a sum of consecutive naturals, for example, 4618243 + ... + 4618288.

It is an arithmetic number, because the mean of its divisors is an integer number (55419192).

Almost surely, 2^212440213 is an apocalyptic number.

212440213 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

212440213 is a deficient number, since it is larger than the sum of its proper divisors (9236555).

212440213 is an equidigital number, since it uses as much as digits as its factorization.

212440213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9236554.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 212440213 is about 14575.3289156712. The cubic root of 212440213 is about 596.6856261813.

Adding to 212440213 its reverse (312044212), we get a palindrome (524484425).

The spelling of 212440213 in words is "two hundred twelve million, four hundred forty thousand, two hundred thirteen".