216770 has 16 divisors (see below), whose sum is σ = 398520. Its totient is φ = 84864.

The previous prime is 216761. The next prime is 216779. The reversal of 216770 is 77612.

It is a happy number.

216770 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (216761) and next prime (216779).

It can be written as a sum of positive squares in 4 ways, for example, as 214369 + 2401 = 463^2 + 49^2 .

It is a plaindrome in base 13.

It is a nialpdrome in base 12.

It is a zygodrome in base 13.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 216770.

It is not an unprimeable number, because it can be changed into a prime (216779) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 326 + ... + 734.

2²¹⁶⁷⁷⁰ is an apocalyptic number.

216770 is a deficient number, since it is larger than the sum of its proper divisors (181750).

216770 is a wasteful number, since it uses less digits than its factorization.

216770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469.

The product of its (nonzero) digits is 588, while the sum is 23.

The square root of 216770 is about 465.5856526999. The cubic root of 216770 is about 60.0712117443.

The spelling of 216770 in words is "two hundred sixteen thousand, seven hundred seventy".