211897136 has 30 divisors (see below), whose sum is σ = 451270596. Its totient is φ = 96316000.

The previous prime is 211897117. The next prime is 211897151. The reversal of 211897136 is 631798112.

211897136 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 211897136.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 52790 + ... + 56661.

Almost surely, 2^211897136 is an apocalyptic number.

It is an amenable number.

211897136 is an abundant number, since it is smaller than the sum of its proper divisors (239373460).

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

211897136 is a wasteful number, since it uses less digits than its factorization.

211897136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109481 (or 109464 counting only the distinct ones).

The product of its digits is 18144, while the sum is 38.

The square root of 211897136 is about 14556.6869857121. The cubic root of 211897136 is about 596.1767414210.

The spelling of 211897136 in words is "two hundred eleven million, eight hundred ninety-seven thousand, one hundred thirty-six".