211444055420 has 48 divisors (see below), whose sum is σ = 483950224800. Its totient is φ = 77131021056.

The previous prime is 211444055413. The next prime is 211444055441. The reversal of 211444055420 is 24550444112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4877495 + ... + 4920654.

It is an arithmetic number, because the mean of its divisors is an integer number (10082296350).

Almost surely, 2^211444055420 is an apocalyptic number.

211444055420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211444055420 is an abundant number, since it is smaller than the sum of its proper divisors (272506169380).

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

211444055420 is a wasteful number, since it uses less digits than its factorization.

211444055420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9798254 (or 9798252 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 32.

Adding to 211444055420 its reverse (24550444112), we get a palindrome (235994499532).

The spelling of 211444055420 in words is "two hundred eleven billion, four hundred forty-four million, fifty-five thousand, four hundred twenty".