212193223 has 24 divisors (see below), whose sum is σ = 239304240. Its totient is φ = 187968000.

The previous prime is 212193217. The next prime is 212193281. The reversal of 212193223 is 322391212.

It is not a de Polignac number, because 212193223 - 2²¹ = 210096071 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 (212193283) 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 23 ways as a sum of consecutive naturals, for example, 1185348 + ... + 1185526.

It is an arithmetic number, because the mean of its divisors is an integer number (9971010).

Almost surely, 2^212193223 is an apocalyptic number.

212193223 is a deficient number, since it is larger than the sum of its proper divisors (27111017).

212193223 is a wasteful number, since it uses less digits than its factorization.

212193223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399 (or 388 counting only the distinct ones).

The product of its digits is 1296, while the sum is 25.

The square root of 212193223 is about 14566.8535724088. The cubic root of 212193223 is about 596.4542943756.

It can be divided in two parts, 21219 and 3223, that added together give a palindrome (24442).

The spelling of 212193223 in words is "two hundred twelve million, one hundred ninety-three thousand, two hundred twenty-three".