211444112440 has 64 divisors (see below), whose sum is σ = 541564392960. Its totient is φ = 73545774720.

The previous prime is 211444112437. The next prime is 211444112459. The reversal of 211444112440 is 44211444112.

It is a super-2 number, since 2×211444112440² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211444112399 and 211444112408.

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 15 ways as a sum of consecutive naturals, for example, 10436724 + ... + 10456963.

It is an arithmetic number, because the mean of its divisors is an integer number (8461943640).

Almost surely, 2^211444112440 is an apocalyptic number.

211444112440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211444112440 is an abundant number, since it is smaller than the sum of its proper divisors (330120280520).

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

211444112440 is a wasteful number, since it uses less digits than its factorization.

211444112440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20893732 (or 20893728 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 28.

Adding to 211444112440 its reverse (44211444112), we get a palindrome (255655556552).

The spelling of 211444112440 in words is "two hundred eleven billion, four hundred forty-four million, one hundred twelve thousand, four hundred forty".