65711223 has 16 divisors (see below), whose sum is σ = 99982560. Its totient is φ = 42622848.

The previous prime is 65711189. The next prime is 65711231. The reversal of 65711223 is 32211756.

It is a happy number.

65711223 is a `hidden beast` number, since 657 + 1 + 1 + 2 + 2 + 3 = 666.

It is not a de Polignac number, because 65711223 - 2⁶ = 65711159 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65711263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31890 + ... + 33887.

It is an arithmetic number, because the mean of its divisors is an integer number (6248910).

Almost surely, 2^65711223 is an apocalyptic number.

65711223 is a deficient number, since it is larger than the sum of its proper divisors (34271337).

65711223 is a wasteful number, since it uses less digits than its factorization.

65711223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65823 (or 65817 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 65711223 is about 8106.2459252110. The cubic root of 65711223 is about 403.5337377299.

Adding to 65711223 its reverse (32211756), we get a palindrome (97922979).

The spelling of 65711223 in words is "sixty-five million, seven hundred eleven thousand, two hundred twenty-three".