211040 has 24 divisors (see below), whose sum is σ = 498960. Its totient is φ = 84352.

The previous prime is 211039. The next prime is 211049. The reversal of 211040 is 40112.

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 500 + ... + 819.

It is an arithmetic number, because the mean of its divisors is an integer number (20790).

2²¹¹⁰⁴⁰ is an apocalyptic number.

211040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211040 is an abundant number, since it is smaller than the sum of its proper divisors (287920).

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

211040 is a wasteful number, since it uses less digits than its factorization.

211040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1334 (or 1326 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 211040 is about 459.3909010853. The cubic root of 211040 is about 59.5371798790.

Adding to 211040 its reverse (40112), we get a palindrome (251152).

The spelling of 211040 in words is "two hundred eleven thousand, forty", and thus it is an iban number.