216772 has 6 divisors (see below), whose sum is σ = 379358. Its totient is φ = 108384.

The previous prime is 216761. The next prime is 216779. The reversal of 216772 is 277612.

216772 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 only one way, i.e., 207936 + 8836 = 456^2 + 94^2 .

It is a plaindrome in base 13.

It is a nialpdrome in base 12.

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

216772 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 as a sum of consecutive naturals, namely, 27093 + ... + 27100.

2²¹⁶⁷⁷² is an apocalyptic number.

It is an amenable number.

216772 is a deficient number, since it is larger than the sum of its proper divisors (162586).

216772 is a wasteful number, since it uses less digits than its factorization.

216772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54197 (or 54195 counting only the distinct ones).

The product of its digits is 1176, while the sum is 25.

The square root of 216772 is about 465.5878005275. The cubic root of 216772 is about 60.0713964901.

The spelling of 216772 in words is "two hundred sixteen thousand, seven hundred seventy-two".