211612055 has 16 divisors (see below), whose sum is σ = 260647200. Its totient is φ = 164868480.

The previous prime is 211612019. The next prime is 211612057. The reversal of 211612055 is 550216112.

It is a happy number.

It is not a de Polignac number, because 211612055 - 2¹⁰ = 211611031 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 211612055.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211612057) 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, 28865 + ... + 35445.

It is an arithmetic number, because the mean of its divisors is an integer number (16290450).

Almost surely, 2^211612055 is an apocalyptic number.

211612055 is a deficient number, since it is larger than the sum of its proper divisors (49035145).

211612055 is a wasteful number, since it uses less digits than its factorization.

211612055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6754.

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 211612055 is about 14546.8915923643. The cubic root of 211612055 is about 595.9092611061.

Adding to 211612055 its reverse (550216112), we get a palindrome (761828167).

The spelling of 211612055 in words is "two hundred eleven million, six hundred twelve thousand, fifty-five".