211143440440 has 16 divisors (see below), whose sum is σ = 475072741080. Its totient is φ = 84457376160.

The previous prime is 211143440393. The next prime is 211143440441. The reversal of 211143440440 is 44044341112.

It is a junction number, because it is equal to n+sod(n) for n = 211143440399 and 211143440408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211143440441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2639292966 + ... + 2639293045.

Almost surely, 2^211143440440 is an apocalyptic number.

211143440440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211143440440 is an abundant number, since it is smaller than the sum of its proper divisors (263929300640).

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

211143440440 is a wasteful number, since it uses less digits than its factorization.

211143440440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5278586022 (or 5278586018 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 28.

Adding to 211143440440 its reverse (44044341112), we get a palindrome (255187781552).

The spelling of 211143440440 in words is "two hundred eleven billion, one hundred forty-three million, four hundred forty thousand, four hundred forty".