212130155 has 16 divisors (see below), whose sum is σ = 271192320. Its totient is φ = 158829408.

The previous prime is 212130151. The next prime is 212130161. The reversal of 212130155 is 551031212.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 212130155 - 2² = 212130151 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212130151) 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, 5567 + ... + 21336.

It is an arithmetic number, because the mean of its divisors is an integer number (16949520).

Almost surely, 2^212130155 is an apocalyptic number.

212130155 is a deficient number, since it is larger than the sum of its proper divisors (59062165).

212130155 is a wasteful number, since it uses less digits than its factorization.

212130155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27010.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 212130155 is about 14564.6886338157. The cubic root of 212130155 is about 596.3951958703.

Adding to 212130155 its reverse (551031212), we get a palindrome (763161367).

The spelling of 212130155 in words is "two hundred twelve million, one hundred thirty thousand, one hundred fifty-five".