212005316 has 6 divisors (see below), whose sum is σ = 371009310. Its totient is φ = 106002656.

The previous prime is 212005307. The next prime is 212005319. The reversal of 212005316 is 613500212.

It can be written as a sum of positive squares in only one way, i.e., 199374400 + 12630916 = 14120^2 + 3554^2 .

It is not an unprimeable number, because it can be changed into a prime (212005319) by changing a digit.

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 as a sum of consecutive naturals, namely, 26500661 + ... + 26500668.

It is an arithmetic number, because the mean of its divisors is an integer number (61834885).

Almost surely, 2^212005316 is an apocalyptic number.

It is an amenable number.

212005316 is a deficient number, since it is larger than the sum of its proper divisors (159003994).

212005316 is a wasteful number, since it uses less digits than its factorization.

212005316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53001333 (or 53001331 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 212005316 is about 14560.4023296061. The cubic root of 212005316 is about 596.2781796766.

Adding to 212005316 its reverse (613500212), we get a palindrome (825505528).

The spelling of 212005316 in words is "two hundred twelve million, five thousand, three hundred sixteen".