212707285 has 24 divisors (see below), whose sum is σ = 302542776. Its totient is φ = 143095680.

The previous prime is 212707279. The next prime is 212707343. The reversal of 212707285 is 582707212.

It can be written as a sum of positive squares in 4 ways, for example, as 509796 + 212197489 = 714^2 + 14567^2 .

It is not a de Polignac number, because 212707285 - 2¹⁷ = 212576213 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212707285.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4795 + ... + 21175.

It is an arithmetic number, because the mean of its divisors is an integer number (12605949).

Almost surely, 2^212707285 is an apocalyptic number.

It is an amenable number.

212707285 is a deficient number, since it is larger than the sum of its proper divisors (89835491).

212707285 is a wasteful number, since it uses less digits than its factorization.

212707285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16453 (or 16446 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 34.

The square root of 212707285 is about 14584.4878209692. The cubic root of 212707285 is about 596.9355651927.

The spelling of 212707285 in words is "two hundred twelve million, seven hundred seven thousand, two hundred eighty-five".