212005115 has 12 divisors (see below), whose sum is σ = 295942176. Its totient is φ = 145374768.

The previous prime is 212005081. The next prime is 212005127. The reversal of 212005115 is 511500212.

It is not a de Polignac number, because 212005115 - 2¹² = 212001019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212005093 and 212005102.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 432419 + ... + 432908.

It is an arithmetic number, because the mean of its divisors is an integer number (24661848).

Almost surely, 2^212005115 is an apocalyptic number.

212005115 is a deficient number, since it is larger than the sum of its proper divisors (83937061).

212005115 is an equidigital number, since it uses as much as digits as its factorization.

212005115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 865346 (or 865339 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 17.

The square root of 212005115 is about 14560.3954273227. The cubic root of 212005115 is about 596.2779912349.

Adding to 212005115 its reverse (511500212), we get a palindrome (723505327).

The spelling of 212005115 in words is "two hundred twelve million, five thousand, one hundred fifteen".