212223231 has 72 divisors (see below), whose sum is σ = 362675040. Its totient is φ = 119180160.

The previous prime is 212223227. The next prime is 212223269. The reversal of 212223231 is 132322212.

212223231 is a `hidden beast` number, since 212 + 223 + 231 = 666.

It is not a de Polignac number, because 212223231 - 2² = 212223227 is a prime.

It is a super-2 number, since 2×212223231² = 90077399552158722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212223931) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 926625 + ... + 926853.

Almost surely, 2^212223231 is an apocalyptic number.

212223231 is a deficient number, since it is larger than the sum of its proper divisors (150451809).

212223231 is a wasteful number, since it uses less digits than its factorization.

212223231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317 (or 303 counting only the distinct ones).

The product of its digits is 288, while the sum is 18.

The square root of 212223231 is about 14567.8835456630. The cubic root of 212223231 is about 596.4824095632.

Adding to 212223231 its reverse (132322212), we get a palindrome (344545443).

The spelling of 212223231 in words is "two hundred twelve million, two hundred twenty-three thousand, two hundred thirty-one".