211224252 has 24 divisors (see below), whose sum is σ = 521848656. Its totient is φ = 66266368.

The previous prime is 211224227. The next prime is 211224283. The reversal of 211224252 is 252422112.

211224252 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 517503 + ... + 517910.

It is an arithmetic number, because the mean of its divisors is an integer number (21743694).

Almost surely, 2^211224252 is an apocalyptic number.

It is an amenable number.

211224252 is an abundant number, since it is smaller than the sum of its proper divisors (310624404).

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

211224252 is a wasteful number, since it uses less digits than its factorization.

211224252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1035437 (or 1035435 counting only the distinct ones).

The product of its digits is 640, while the sum is 21.

The square root of 211224252 is about 14533.5560686296. The cubic root of 211224252 is about 595.5450148244.

Adding to 211224252 its reverse (252422112), we get a palindrome (463646364).

The spelling of 211224252 in words is "two hundred eleven million, two hundred twenty-four thousand, two hundred fifty-two".