211304044240 has 40 divisors (see below), whose sum is σ = 491665058208. Its totient is φ = 84455698560.

The previous prime is 211304044213. The next prime is 211304044241. The reversal of 211304044240 is 42440403112.

211304044240 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×211304044240² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211304044241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 926706 + ... + 1131985.

Almost surely, 2^211304044240 is an apocalyptic number.

211304044240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211304044240 is an abundant number, since it is smaller than the sum of its proper divisors (280361013968).

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

211304044240 is a wasteful number, since it uses less digits than its factorization.

211304044240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2059987 (or 2059981 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 211304044240 its reverse (42440403112), we get a palindrome (253744447352).

The spelling of 211304044240 in words is "two hundred eleven billion, three hundred four million, forty-four thousand, two hundred forty".