212066305 has 16 divisors (see below), whose sum is σ = 278107200. Its totient is φ = 153956160.

The previous prime is 212066287. The next prime is 212066329. The reversal of 212066305 is 503660212.

It is not a de Polignac number, because 212066305 - 2¹⁷ = 211935233 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212066305.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30931 + ... + 37159.

It is an arithmetic number, because the mean of its divisors is an integer number (17381700).

Almost surely, 2^212066305 is an apocalyptic number.

It is an amenable number.

212066305 is a deficient number, since it is larger than the sum of its proper divisors (66040895).

212066305 is a wasteful number, since it uses less digits than its factorization.

212066305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6864.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 212066305 is about 14562.4965236047. The cubic root of 212066305 is about 596.3353526505.

The spelling of 212066305 in words is "two hundred twelve million, sixty-six thousand, three hundred five".