211440310144 has 64 divisors (see below), whose sum is σ = 506741385600. Its totient is φ = 85847938560.

The previous prime is 211440310121. The next prime is 211440310183. The reversal of 211440310144 is 441013044112.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6193042 + ... + 6227089.

It is an arithmetic number, because the mean of its divisors is an integer number (7917834150).

Almost surely, 2^211440310144 is an apocalyptic number.

It is an amenable number.

211440310144 is an abundant number, since it is smaller than the sum of its proper divisors (295301075456).

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

211440310144 is a wasteful number, since it uses less digits than its factorization.

211440310144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12420171 (or 12420159 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 211440310144 its reverse (441013044112), we get a palindrome (652453354256).

The spelling of 211440310144 in words is "two hundred eleven billion, four hundred forty million, three hundred ten thousand, one hundred forty-four".