212412224 has 28 divisors (see below), whose sum is σ = 425386500. Its totient is φ = 105228288.

The previous prime is 212412203. The next prime is 212412241. The reversal of 212412224 is 422214212.

It can be written as a sum of positive squares in 2 ways, for example, as 81721600 + 130690624 = 9040^2 + 11432^2 .

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 212412196 and 212412205.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8249 + ... + 22200.

It is an arithmetic number, because the mean of its divisors is an integer number (15192375).

Almost surely, 2^212412224 is an apocalyptic number.

It is an amenable number.

212412224 is an abundant number, since it is smaller than the sum of its proper divisors (212974276).

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

212412224 is a wasteful number, since it uses less digits than its factorization.

212412224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30570 (or 30560 counting only the distinct ones).

The product of its digits is 512, while the sum is 20.

The square root of 212412224 is about 14574.3687341854. The cubic root of 212412224 is about 596.6594205848.

Adding to 212412224 its reverse (422214212), we get a palindrome (634626436).

The spelling of 212412224 in words is "two hundred twelve million, four hundred twelve thousand, two hundred twenty-four".