212217223 has 4 divisors (see below), whose sum is σ = 214164280. Its totient is φ = 210270168.

The previous prime is 212217221. The next prime is 212217283. The reversal of 212217223 is 322712212.

212217223 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 212217223 - 2¹ = 212217221 is a prime.

It is a super-2 number, since 2×212217223² = 90072299475663458, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212217194 and 212217203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212217221) 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, 973365 + ... + 973582.

It is an arithmetic number, because the mean of its divisors is an integer number (53541070).

Almost surely, 2^212217223 is an apocalyptic number.

212217223 is a deficient number, since it is larger than the sum of its proper divisors (1947057).

212217223 is a wasteful number, since it uses less digits than its factorization.

212217223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1947056.

The product of its digits is 672, while the sum is 22.

The square root of 212217223 is about 14567.6773371736. The cubic root of 212217223 is about 596.4767807416.

Adding to 212217223 its reverse (322712212), we get a palindrome (534929435).

The spelling of 212217223 in words is "two hundred twelve million, two hundred seventeen thousand, two hundred twenty-three".