212115 has 16 divisors (see below), whose sum is σ = 345600. Its totient is φ = 111072.

The previous prime is 212099. The next prime is 212117. The reversal of 212115 is 511212.

It is not a de Polignac number, because 212115 - 2⁴ = 212099 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212115.

It is not an unprimeable number, because it can be changed into a prime (212117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1096 + ... + 1274.

It is an arithmetic number, because the mean of its divisors is an integer number (21600).

2²¹²¹¹⁵ is an apocalyptic number.

212115 is a deficient number, since it is larger than the sum of its proper divisors (133485).

212115 is a wasteful number, since it uses less digits than its factorization.

212115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266.

The product of its digits is 20, while the sum is 12.

The square root of 212115 is about 460.5594424176. The cubic root of 212115 is about 59.6380992979.

Adding to 212115 its reverse (511212), we get a palindrome (723327).

The spelling of 212115 in words is "two hundred twelve thousand, one hundred fifteen".