212000017 has 4 divisors (see below), whose sum is σ = 212052196. Its totient is φ = 211947840.

The previous prime is 212000003. The next prime is 212000021. The reversal of 212000017 is 710000212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 39891856 + 172108161 = 6316^2 + 13119^2 .

It is a cyclic number.

It is not a de Polignac number, because 212000017 - 2¹⁹ = 211475729 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211999970 and 212000006.

It is not an unprimeable number, because it can be changed into a prime (212000057) 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 in 3 ways as a sum of consecutive naturals, for example, 19428 + ... + 28309.

It is an arithmetic number, because the mean of its divisors is an integer number (53013049).

Almost surely, 2^212000017 is an apocalyptic number.

It is an amenable number.

212000017 is a deficient number, since it is larger than the sum of its proper divisors (52179).

212000017 is an equidigital number, since it uses as much as digits as its factorization.

212000017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52178.

The product of its (nonzero) digits is 28, while the sum is 13.

The square root of 212000017 is about 14560.2203623434. The cubic root of 212000017 is about 596.2732117125.

Adding to 212000017 its reverse (710000212), we get a palindrome (922000229).

The spelling of 212000017 in words is "two hundred twelve million, seventeen", and thus it is an aban number.