211204344320 has 120 divisors (see below), whose sum is σ = 537937499484. Its totient is φ = 79511945216.

The previous prime is 211204344313. The next prime is 211204344331. The reversal of 211204344320 is 23443402112.

It can be written as a sum of positive squares in 6 ways, for example, as 188550482176 + 22653862144 = 434224^2 + 150512^2 .

It is a super-2 number, since 2×211204344320² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 211204344320.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 597104 + ... + 882576.

Almost surely, 2^211204344320 is an apocalyptic number.

211204344320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211204344320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (268968749742).

211204344320 is an abundant number, since it is smaller than the sum of its proper divisors (326733155164).

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

211204344320 is an equidigital number, since it uses as much as digits as its factorization.

211204344320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285530 (or 285497 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 211204344320 its reverse (23443402112), we get a palindrome (234647746432).

The spelling of 211204344320 in words is "two hundred eleven billion, two hundred four million, three hundred forty-four thousand, three hundred twenty".