211456 has 40 divisors (see below), whose sum is σ = 491040. Its totient is φ = 89088.

The previous prime is 211441. The next prime is 211457. The reversal of 211456 is 654112.

It is not an unprimeable number, because it can be changed into a prime (211457) 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, 3555 + ... + 3613.

It is an arithmetic number, because the mean of its divisors is an integer number (12276).

2²¹¹⁴⁵⁶ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (245520).

211456 is an abundant number, since it is smaller than the sum of its proper divisors (279584).

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

211456 is an frugal number, since it uses more digits than its factorization.

211456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84 (or 68 counting only the distinct ones).

The product of its digits is 240, while the sum is 19.

The square root of 211456 is about 459.8434516224. The cubic root of 211456 is about 59.5762739068.

Adding to 211456 its reverse (654112), we get a palindrome (865568).

The spelling of 211456 in words is "two hundred eleven thousand, four hundred fifty-six".