212816 has 20 divisors (see below), whose sum is σ = 422592. Its totient is φ = 103776.

The previous prime is 212801. The next prime is 212827. The reversal of 212816 is 618212.

212816 is digitally balanced in base 3, 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 3 ways as a sum of consecutive naturals, for example, 611 + ... + 893.

2²¹²⁸¹⁶ is an apocalyptic number.

It is an amenable number.

212816 is a deficient number, since it is larger than the sum of its proper divisors (209776).

212816 is a wasteful number, since it uses less digits than its factorization.

212816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338 (or 332 counting only the distinct ones).

The product of its digits is 192, while the sum is 20.

The square root of 212816 is about 461.3198456603. The cubic root of 212816 is about 59.7037246081.

The spelling of 212816 in words is "two hundred twelve thousand, eight hundred sixteen".