216079 has 4 divisors (see below), whose sum is σ = 223560. Its totient is φ = 208600.

The previous prime is 216071. The next prime is 216091. The reversal of 216079 is 970612.

216079 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 216079 - 2³ = 216071 is a prime.

It is a Duffinian number.

216079 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216071) 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, 3697 + ... + 3754.

It is an arithmetic number, because the mean of its divisors is an integer number (55890).

216079 is a Friedman number, since it can be written as 79+60^(2+1), using all its digits and the basic arithmetic operations.

2²¹⁶⁰⁷⁹ is an apocalyptic number.

216079 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

216079 is a deficient number, since it is larger than the sum of its proper divisors (7481).

216079 is an equidigital number, since it uses as much as digits as its factorization.

216079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7480.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 216079 is about 464.8429842431. The cubic root of 216079 is about 60.0073139232.

The spelling of 216079 in words is "two hundred sixteen thousand, seventy-nine".