211234400 has 144 divisors (see below), whose sum is σ = 585118800. Its totient is φ = 73820160.

The previous prime is 211234379. The next prime is 211234423. The reversal of 211234400 is 4432112.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 197066 + ... + 198134.

It is an arithmetic number, because the mean of its divisors is an integer number (4063325).

Almost surely, 2^211234400 is an apocalyptic number.

211234400 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 211234400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (292559400).

211234400 is an abundant number, since it is smaller than the sum of its proper divisors (373884400).

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

211234400 is a wasteful number, since it uses less digits than its factorization.

211234400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1121 (or 1108 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 211234400 is about 14533.9051875262. The cubic root of 211234400 is about 595.5545520721.

Adding to 211234400 its reverse (4432112), we get a palindrome (215666512).

The spelling of 211234400 in words is "two hundred eleven million, two hundred thirty-four thousand, four hundred".