211240 has 16 divisors (see below), whose sum is σ = 475380. Its totient is φ = 84480.

The previous prime is 211231. The next prime is 211241. The reversal of 211240 is 42112.

211240 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 195364 + 15876 = 442^2 + 126^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (211241) 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, 2601 + ... + 2680.

2²¹¹²⁴⁰ is an apocalyptic number.

211240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211240 is an abundant number, since it is smaller than the sum of its proper divisors (264140).

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

211240 is a wasteful number, since it uses less digits than its factorization.

211240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5292 (or 5288 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 211240 is about 459.6085290766. The cubic root of 211240 is about 59.5559814908. Note that the first 3 decimals are identical.

Adding to 211240 its reverse (42112), we get a palindrome (253352).

The spelling of 211240 in words is "two hundred eleven thousand, two hundred forty", and thus it is an iban number.