211331443240 has 32 divisors (see below), whose sum is σ = 481514688000. Its totient is φ = 83462543424.

The previous prime is 211331443201. The next prime is 211331443247. The reversal of 211331443240 is 42344133112.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 211331443199 and 211331443208.

It is not an unprimeable number, because it can be changed into a prime (211331443247) by changing a digit.

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, 33435360 + ... + 33441679.

It is an arithmetic number, because the mean of its divisors is an integer number (15047334000).

Almost surely, 2^211331443240 is an apocalyptic number.

211331443240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211331443240 is an abundant number, since it is smaller than the sum of its proper divisors (270183244760).

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

211331443240 is a wasteful number, since it uses less digits than its factorization.

211331443240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66877129 (or 66877125 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 211331443240 its reverse (42344133112), we get a palindrome (253675576352).

The spelling of 211331443240 in words is "two hundred eleven billion, three hundred thirty-one million, four hundred forty-three thousand, two hundred forty".