211440252 has 12 divisors (see below), whose sum is σ = 493360616. Its totient is φ = 70480080.

The previous prime is 211440241. The next prime is 211440269. The reversal of 211440252 is 252044112.

211440252 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8809999 + ... + 8810022.

Almost surely, 2^211440252 is an apocalyptic number.

It is an amenable number.

211440252 is an abundant number, since it is smaller than the sum of its proper divisors (281920364).

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

211440252 is a wasteful number, since it uses less digits than its factorization.

211440252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17620028 (or 17620026 counting only the distinct ones).

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

The square root of 211440252 is about 14540.9852485999. The cubic root of 211440252 is about 595.7479490648.

Adding to 211440252 its reverse (252044112), we get a palindrome (463484364).

The spelling of 211440252 in words is "two hundred eleven million, four hundred forty thousand, two hundred fifty-two".