211864912 has 80 divisors (see below), whose sum is σ = 488857600. Its totient is φ = 87039360.

The previous prime is 211864909. The next prime is 211864949. The reversal of 211864912 is 219468112.

It is a happy number.

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 15 ways as a sum of consecutive naturals, for example, 482389 + ... + 482827.

It is an arithmetic number, because the mean of its divisors is an integer number (6110720).

Almost surely, 2^211864912 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 211864912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (244428800).

211864912 is an abundant number, since it is smaller than the sum of its proper divisors (276992688).

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

211864912 is a wasteful number, since it uses less digits than its factorization.

211864912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 624 (or 618 counting only the distinct ones).

The product of its digits is 6912, while the sum is 34.

The square root of 211864912 is about 14555.5800983678. The cubic root of 211864912 is about 596.1465189372.

The spelling of 211864912 in words is "two hundred eleven million, eight hundred sixty-four thousand, nine hundred twelve".