212055216 has 80 divisors (see below), whose sum is σ = 574248960. Its totient is φ = 67302400.

The previous prime is 212055209. The next prime is 212055241. The reversal of 212055216 is 612550212.

It is a happy number.

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, 442465 + ... + 442943.

It is an arithmetic number, because the mean of its divisors is an integer number (7178112).

Almost surely, 2^212055216 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 212055216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (287124480).

212055216 is an abundant number, since it is smaller than the sum of its proper divisors (362193744).

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

212055216 is a wasteful number, since it uses less digits than its factorization.

212055216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 914 (or 908 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 212055216 is about 14562.1157803391. The cubic root of 212055216 is about 596.3249582945.

The spelling of 212055216 in words is "two hundred twelve million, fifty-five thousand, two hundred sixteen".