212421552 has 80 divisors (see below), whose sum is σ = 631507200. Its totient is φ = 60270336.

The previous prime is 212421523. The next prime is 212421569. The reversal of 212421552 is 255124212.

212421552 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47943 + ... + 52185.

It is an arithmetic number, because the mean of its divisors is an integer number (7893840).

Almost surely, 2^212421552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212421552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (315753600).

212421552 is an abundant number, since it is smaller than the sum of its proper divisors (419085648).

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

212421552 is a wasteful number, since it uses less digits than its factorization.

212421552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4410 (or 4404 counting only the distinct ones).

The product of its digits is 1600, while the sum is 24.

The square root of 212421552 is about 14574.6887445324. The cubic root of 212421552 is about 596.6681544789.

Adding to 212421552 its reverse (255124212), we get a palindrome (467545764).

The spelling of 212421552 in words is "two hundred twelve million, four hundred twenty-one thousand, five hundred fifty-two".