211711 has 2 divisors, whose sum is σ = 211712. Its totient is φ = 211710.

The previous prime is 211693. The next prime is 211723. The reversal of 211711 is 117112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211711 - 2⁷ = 211583 is a prime.

It is a Chen prime.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 211691 and 211700.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105855 + 105856.

It is an arithmetic number, because the mean of its divisors is an integer number (105856).

2²¹¹⁷¹¹ is an apocalyptic number.

211711 is a deficient number, since it is larger than the sum of its proper divisors (1).

211711 is an equidigital number, since it uses as much as digits as its factorization.

211711 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14, while the sum is 13.

The square root of 211711 is about 460.1206363553. The cubic root of 211711 is about 59.6002124521.

Adding to 211711 its reverse (117112), we get a palindrome (328823).

The spelling of 211711 in words is "two hundred eleven thousand, seven hundred eleven", and thus it is an iban number.