65111 has 2 divisors, whose sum is σ = 65112. Its totient is φ = 65110.

The previous prime is 65101. The next prime is 65119. The reversal of 65111 is 11156.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65111 is a prime.

It is a Sophie Germain prime.

65111 is a modest number, since divided by 111 gives 65 as remainder.

It is a plaindrome in base 15.

It is a nialpdrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32555 + 32556.

It is an arithmetic number, because the mean of its divisors is an integer number (32556).

2⁶⁵¹¹¹ is an apocalyptic number.

65111 is a deficient number, since it is larger than the sum of its proper divisors (1).

65111 is an equidigital number, since it uses as much as digits as its factorization.

65111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30, while the sum is 14.

The square root of 65111 is about 255.1685717325. The cubic root of 65111 is about 40.2301317783.

Adding to 65111 its reverse (11156), we get a palindrome (76267).

The spelling of 65111 in words is "sixty-five thousand, one hundred eleven".