211232213 has 4 divisors (see below), whose sum is σ = 214812480. Its totient is φ = 207651948.

The previous prime is 211232209. The next prime is 211232243. The reversal of 211232213 is 312232112.

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 211232213 - 2² = 211232209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211232191 and 211232200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211232243) 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, 1790045 + ... + 1790162.

It is an arithmetic number, because the mean of its divisors is an integer number (53703120).

Almost surely, 2^211232213 is an apocalyptic number.

It is an amenable number.

211232213 is a deficient number, since it is larger than the sum of its proper divisors (3580267).

211232213 is an equidigital number, since it uses as much as digits as its factorization.

211232213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3580266.

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

The square root of 211232213 is about 14533.8299494662. The cubic root of 211232213 is about 595.5524967214.

Adding to 211232213 its reverse (312232112), we get a palindrome (523464325).

The spelling of 211232213 in words is "two hundred eleven million, two hundred thirty-two thousand, two hundred thirteen".