212205015 has 160 divisors (see below), whose sum is σ = 459993600. Its totient is φ = 92378880.

The previous prime is 212204987. The next prime is 212205017. The reversal of 212205015 is 510502212.

It is not a de Polignac number, because 212205015 - 2¹⁷ = 212073943 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212205017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 1946781 + ... + 1946889.

It is an arithmetic number, because the mean of its divisors is an integer number (2874960).

Almost surely, 2^212205015 is an apocalyptic number.

212205015 is an abundant number, since it is smaller than the sum of its proper divisors (247788585).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212205015 is a wasteful number, since it uses less digits than its factorization.

212205015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179 (or 170 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 212205015 is about 14567.2583213177. The cubic root of 212205015 is about 596.4653428886.

Adding to 212205015 its reverse (510502212), we get a palindrome (722707227).

The spelling of 212205015 in words is "two hundred twelve million, two hundred five thousand, fifteen".