216773 has 4 divisors (see below), whose sum is σ = 217920. Its totient is φ = 215628.

The previous prime is 216761. The next prime is 216779. The reversal of 216773 is 377612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 216773 - 2⁴ = 216757 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 215 + ... + 692.

It is an arithmetic number, because the mean of its divisors is an integer number (54480).

2²¹⁶⁷⁷³ is an apocalyptic number.

It is an amenable number.

216773 is a deficient number, since it is larger than the sum of its proper divisors (1147).

216773 is an equidigital number, since it uses as much as digits as its factorization.

216773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1146.

The product of its digits is 1764, while the sum is 26.

The square root of 216773 is about 465.5888744375. The cubic root of 216773 is about 60.0714888626.

It can be divided in two parts, 216 and 773, that added together give a palindrome (989).

The spelling of 216773 in words is "two hundred sixteen thousand, seven hundred seventy-three".