212213 has 4 divisors (see below), whose sum is σ = 213900. Its totient is φ = 210528.

The previous prime is 212209. The next prime is 212227. The reversal of 212213 is 312212.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 97969 + 114244 = 313^2 + 338^2 .

It is a cyclic number.

It is not a de Polignac number, because 212213 - 2² = 212209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212194 and 212203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212203) 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, 638 + ... + 911.

It is an arithmetic number, because the mean of its divisors is an integer number (53475).

2²¹²²¹³ is an apocalyptic number.

It is an amenable number.

212213 is a deficient number, since it is larger than the sum of its proper divisors (1687).

212213 is a wasteful number, since it uses less digits than its factorization.

212213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1686.

The product of its digits is 24, while the sum is 11.

The square root of 212213 is about 460.6658224787. The cubic root of 212213 is about 59.6472824201.

Adding to 212213 its reverse (312212), we get a palindrome (524425).

Subtracting 212213 from its reverse (312212), we obtain a palindrome (99999).

The spelling of 212213 in words is "two hundred twelve thousand, two hundred thirteen".