212023224 has 64 divisors (see below), whose sum is σ = 673094400. Its totient is φ = 60577632.

The previous prime is 212023199. The next prime is 212023241. The reversal of 212023224 is 422320212.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 212023197 and 212023206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68602 + ... + 71625.

It is an arithmetic number, because the mean of its divisors is an integer number (10517100).

Almost surely, 2^212023224 is an apocalyptic number.

212023224 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

212023224 is an abundant number, since it is smaller than the sum of its proper divisors (461071176).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212023224 is a wasteful number, since it uses less digits than its factorization.

212023224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140249 (or 140239 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 212023224 is about 14561.0172721551. The cubic root of 212023224 is about 596.2949683264.

Adding to 212023224 its reverse (422320212), we get a palindrome (634343436).

The spelling of 212023224 in words is "two hundred twelve million, twenty-three thousand, two hundred twenty-four".