212320017 has 48 divisors (see below), whose sum is σ = 386725248. Its totient is φ = 109244160.

The previous prime is 212320007. The next prime is 212320019. The reversal of 212320017 is 710023212.

It is not a de Polignac number, because 212320017 - 2⁴ = 212320001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212320019) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 30418 + ... + 36740.

It is an arithmetic number, because the mean of its divisors is an integer number (8056776).

Almost surely, 2^212320017 is an apocalyptic number.

It is an amenable number.

212320017 is a deficient number, since it is larger than the sum of its proper divisors (174405231).

212320017 is a wasteful number, since it uses less digits than its factorization.

212320017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6390 (or 6387 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 212320017 is about 14571.2050634119. The cubic root of 212320017 is about 596.5730725445.

Adding to 212320017 its reverse (710023212), we get a palindrome (922343229).

The spelling of 212320017 in words is "two hundred twelve million, three hundred twenty thousand, seventeen".