212015 has 4 divisors (see below), whose sum is σ = 254424. Its totient is φ = 169608.

The previous prime is 211997. The next prime is 212029. The reversal of 212015 is 510212.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212015 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211987 and 212005.

It is a congruent number.

It is an unprimeable number.

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, 21197 + ... + 21206.

It is an arithmetic number, because the mean of its divisors is an integer number (63606).

2²¹²⁰¹⁵ is an apocalyptic number.

212015 is a deficient number, since it is larger than the sum of its proper divisors (42409).

212015 is an equidigital number, since it uses as much as digits as its factorization.

212015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42408.

The product of its (nonzero) digits is 20, while the sum is 11.

The square root of 212015 is about 460.4508659998. The cubic root of 212015 is about 59.6287258490.

Adding to 212015 its reverse (510212), we get a palindrome (722227).

The spelling of 212015 in words is "two hundred twelve thousand, fifteen".