216774 has 12 divisors (see below), whose sum is σ = 469716. Its totient is φ = 72252.

The previous prime is 216761. The next prime is 216779. The reversal of 216774 is 477612.

It is a Curzon 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.

216774 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6004 + ... + 6039.

It is an arithmetic number, because the mean of its divisors is an integer number (39143).

2²¹⁶⁷⁷⁴ is an apocalyptic number.

216774 is an abundant number, since it is smaller than the sum of its proper divisors (252942).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216774 is a wasteful number, since it uses less digits than its factorization.

216774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12051 (or 12048 counting only the distinct ones).

The product of its digits is 2352, while the sum is 27.

The square root of 216774 is about 465.5899483451. The cubic root of 216774 is about 60.0715812348.

It can be divided in two parts, 216 and 774, that added together give a triangular number (990 = T₄₄).

The spelling of 216774 in words is "two hundred sixteen thousand, seven hundred seventy-four".