211713 has 4 divisors (see below), whose sum is σ = 282288. Its totient is φ = 141140.

The previous prime is 211711. The next prime is 211723. The reversal of 211713 is 317112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 211713 - 2¹ = 211711 is a prime.

It is a D-number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 211692 and 211701.

It is not an unprimeable number, because it can be changed into a prime (211711) 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, 35283 + ... + 35288.

It is an arithmetic number, because the mean of its divisors is an integer number (70572).

2²¹¹⁷¹³ is an apocalyptic number.

It is an amenable number.

211713 is a deficient number, since it is larger than the sum of its proper divisors (70575).

211713 is an equidigital number, since it uses as much as digits as its factorization.

211713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70574.

The product of its digits is 42, while the sum is 15.

The square root of 211713 is about 460.1228096932. The cubic root of 211713 is about 59.6004001294.

Adding to 211713 its reverse (317112), we get a palindrome (528825).

The spelling of 211713 in words is "two hundred eleven thousand, seven hundred thirteen".