211810064 has 10 divisors (see below), whose sum is σ = 410382030. Its totient is φ = 105905024.

The previous prime is 211810051. The next prime is 211810069. The reversal of 211810064 is 460018112.

211810064 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 179774464 + 32035600 = 13408^2 + 5660^2 .

It is not an unprimeable number, because it can be changed into a prime (211810069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6619049 + ... + 6619080.

It is an arithmetic number, because the mean of its divisors is an integer number (41038203).

Almost surely, 2^211810064 is an apocalyptic number.

It is an amenable number.

211810064 is a deficient number, since it is larger than the sum of its proper divisors (198571966).

211810064 is a wasteful number, since it uses less digits than its factorization.

211810064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13238137 (or 13238131 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 211810064 is about 14553.6958879867. The cubic root of 211810064 is about 596.0950706410.

Adding to 211810064 its reverse (460018112), we get a palindrome (671828176).

The spelling of 211810064 in words is "two hundred eleven million, eight hundred ten thousand, sixty-four".