211420800 has 192 divisors, whose sum is σ = 774057600. Its totient is φ = 56355840.

The previous prime is 211420799. The next prime is 211420813. The reversal of 211420800 is 8024112.

It is a tau number, because it is divible by the number of its divisors (192).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 85177 + ... + 87623.

It is an arithmetic number, because the mean of its divisors is an integer number (4031550).

Almost surely, 2^211420800 is an apocalyptic number.

211420800 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 211420800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (387028800).

211420800 is an abundant number, since it is smaller than the sum of its proper divisors (562636800).

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

211420800 is a wasteful number, since it uses less digits than its factorization.

211420800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2480 (or 2457 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 211420800 is about 14540.3163651965. The cubic root of 211420800 is about 595.7296793733.

Adding to 211420800 its reverse (8024112), we get a palindrome (219444912).

The spelling of 211420800 in words is "two hundred eleven million, four hundred twenty thousand, eight hundred".