212130055 has 16 divisors (see below), whose sum is σ = 263579904. Its totient is φ = 163722240.

The previous prime is 212130053. The next prime is 212130073. The reversal of 212130055 is 550031212.

It is not a de Polignac number, because 212130055 - 2¹ = 212130053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212130053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52777 + ... + 56653.

It is an arithmetic number, because the mean of its divisors is an integer number (16473744).

Almost surely, 2^212130055 is an apocalyptic number.

212130055 is a deficient number, since it is larger than the sum of its proper divisors (51449849).

212130055 is a wasteful number, since it uses less digits than its factorization.

212130055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4266.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 212130055 is about 14564.6852008548. The cubic root of 212130055 is about 596.3951021550.

Adding to 212130055 its reverse (550031212), we get a palindrome (762161267).

The spelling of 212130055 in words is "two hundred twelve million, one hundred thirty thousand, fifty-five".