211916055 has 16 divisors (see below), whose sum is σ = 365148000. Its totient is φ = 104327808.

The previous prime is 211916051. The next prime is 211916071. The reversal of 211916055 is 550619112.

It is not a de Polignac number, because 211916055 - 2² = 211916051 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211916051) 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, 543180 + ... + 543569.

It is an arithmetic number, because the mean of its divisors is an integer number (22821750).

Almost surely, 2^211916055 is an apocalyptic number.

211916055 is a deficient number, since it is larger than the sum of its proper divisors (153231945).

211916055 is a wasteful number, since it uses less digits than its factorization.

211916055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1086770.

The product of its (nonzero) digits is 2700, while the sum is 30.

The square root of 211916055 is about 14557.3368100075. The cubic root of 211916055 is about 596.1944838853.

The spelling of 211916055 in words is "two hundred eleven million, nine hundred sixteen thousand, fifty-five".