212043017 has 4 divisors (see below), whose sum is σ = 212396436. Its totient is φ = 211689600.

The previous prime is 212043001. The next prime is 212043047. The reversal of 212043017 is 710340212.

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 151265401 + 60777616 = 12299^2 + 7796^2 .

It is a cyclic number.

It is not a de Polignac number, because 212043017 - 2⁴ = 212043001 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 212043017.

It is not an unprimeable number, because it can be changed into a prime (212043047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 175808 + ... + 177009.

It is an arithmetic number, because the mean of its divisors is an integer number (53099109).

Almost surely, 2^212043017 is an apocalyptic number.

It is an amenable number.

212043017 is a deficient number, since it is larger than the sum of its proper divisors (353419).

212043017 is an equidigital number, since it uses as much as digits as its factorization.

212043017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353418.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 212043017 is about 14561.6969134782. The cubic root of 212043017 is about 596.3135230533.

Adding to 212043017 its reverse (710340212), we get a palindrome (922383229).

The spelling of 212043017 in words is "two hundred twelve million, forty-three thousand, seventeen".