211345 has 8 divisors (see below), whose sum is σ = 259776. Its totient is φ = 164976.

The previous prime is 211339. The next prime is 211349. The reversal of 211345 is 543112.

211345 = 48² + 49² + ... + 90².

211345 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 211345 - 2⁵ = 211313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 277 + ... + 706.

It is an arithmetic number, because the mean of its divisors is an integer number (32472).

2²¹¹³⁴⁵ is an apocalyptic number.

It is an amenable number.

211345 is a deficient number, since it is larger than the sum of its proper divisors (48431).

211345 is an equidigital number, since it uses as much as digits as its factorization.

211345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1031.

The product of its digits is 120, while the sum is 16.

The square root of 211345 is about 459.7227425308. The cubic root of 211345 is about 59.5658475866.

Adding to 211345 its reverse (543112), we get a palindrome (754457).

The spelling of 211345 in words is "two hundred eleven thousand, three hundred forty-five".