216626 has 8 divisors (see below), whose sum is σ = 328860. Its totient is φ = 107008.

The previous prime is 216617. The next prime is 216641. The reversal of 216626 is 626612.

216626 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 203401 + 13225 = 451^2 + 115^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a nialpdrome in base 12.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 216626.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 431 + ... + 786.

2²¹⁶⁶²⁶ is an apocalyptic number.

216626 is a deficient number, since it is larger than the sum of its proper divisors (112234).

216626 is a wasteful number, since it uses less digits than its factorization.

216626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1308.

The product of its digits is 864, while the sum is 23.

The square root of 216626 is about 465.4309830684. The cubic root of 216626 is about 60.0579070579.

The spelling of 216626 in words is "two hundred sixteen thousand, six hundred twenty-six".