212543223 has 16 divisors (see below), whose sum is σ = 296549376. Its totient is φ = 135241920.

The previous prime is 212543213. The next prime is 212543251. The reversal of 212543223 is 322345212.

It is not a de Polignac number, because 212543223 - 2¹⁸ = 212281079 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212543193 and 212543202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212543213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8865 + ... + 22442.

It is an arithmetic number, because the mean of its divisors is an integer number (18534336).

Almost surely, 2^212543223 is an apocalyptic number.

212543223 is a deficient number, since it is larger than the sum of its proper divisors (84006153).

212543223 is a wasteful number, since it uses less digits than its factorization.

212543223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31414.

The product of its digits is 2880, while the sum is 24.

The square root of 212543223 is about 14578.8621984022. The cubic root of 212543223 is about 596.7820527690.

Adding to 212543223 its reverse (322345212), we get a palindrome (534888435).

The spelling of 212543223 in words is "two hundred twelve million, five hundred forty-three thousand, two hundred twenty-three".