65216723 has 8 divisors (see below), whose sum is σ = 76618416. Its totient is φ = 54727200.

The previous prime is 65216717. The next prime is 65216731. The reversal of 65216723 is 32761256.

65216723 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 not a de Polignac number, because 65216723 - 2²² = 61022419 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 65216723.

It is not an unprimeable number, because it can be changed into a prime (65216713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 227888 + ... + 228173.

It is an arithmetic number, because the mean of its divisors is an integer number (9577302).

Almost surely, 2^65216723 is an apocalyptic number.

65216723 is a deficient number, since it is larger than the sum of its proper divisors (11401693).

65216723 is a wasteful number, since it uses less digits than its factorization.

65216723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456085.

The product of its digits is 15120, while the sum is 32.

The square root of 65216723 is about 8075.6871534254. The cubic root of 65216723 is about 402.5189435936.

Adding to 65216723 its reverse (32761256), we get a palindrome (97977979).

The spelling of 65216723 in words is "sixty-five million, two hundred sixteen thousand, seven hundred twenty-three".