216416 has 12 divisors (see below), whose sum is σ = 426132. Its totient is φ = 108192.

The previous prime is 216401. The next prime is 216421. The reversal of 216416 is 614612.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3350 + ... + 3413.

It is an arithmetic number, because the mean of its divisors is an integer number (35511).

2²¹⁶⁴¹⁶ is an apocalyptic number.

It is an amenable number.

216416 is a deficient number, since it is larger than the sum of its proper divisors (209716).

216416 is an equidigital number, since it uses as much as digits as its factorization.

216416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6773 (or 6765 counting only the distinct ones).

The product of its digits is 288, while the sum is 20.

The square root of 216416 is about 465.2053310099. The cubic root of 216416 is about 60.0384938170.

The spelling of 216416 in words is "two hundred sixteen thousand, four hundred sixteen".