216650723 has 12 divisors (see below), whose sum is σ = 225498384. Its totient is φ = 208134000.

The previous prime is 216650713. The next prime is 216650729. The reversal of 216650723 is 327056612.

It is not a de Polignac number, because 216650723 - 2⁶ = 216650659 is a prime.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

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 216650723.

It is not an unprimeable number, because it can be changed into a prime (216650729) 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 11 ways as a sum of consecutive naturals, for example, 144365 + ... + 145857.

It is an arithmetic number, because the mean of its divisors is an integer number (18791532).

Almost surely, 2^216650723 is an apocalyptic number.

216650723 is a deficient number, since it is larger than the sum of its proper divisors (8847661).

216650723 is a wasteful number, since it uses less digits than its factorization.

216650723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1706 (or 1675 counting only the distinct ones).

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

The square root of 216650723 is about 14719.0598544880. The cubic root of 216650723 is about 600.6019172537.

The spelling of 216650723 in words is "two hundred sixteen million, six hundred fifty thousand, seven hundred twenty-three".