216807 has 4 divisors (see below), whose sum is σ = 289080. Its totient is φ = 144536.

The previous prime is 216803. The next prime is 216829. The reversal of 216807 is 708612.

216807 is digitally balanced in base 7, 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 216807 - 2² = 216803 is a prime.

It is a D-number.

216807 is strictly pandigital in base 7.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 216807.

It is not an unprimeable number, because it can be changed into a prime (216803) 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, 36132 + ... + 36137.

It is an arithmetic number, because the mean of its divisors is an integer number (72270).

2²¹⁶⁸⁰⁷ is an apocalyptic number.

216807 is a deficient number, since it is larger than the sum of its proper divisors (72273).

216807 is an equidigital number, since it uses as much as digits as its factorization.

216807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72272.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 216807 is about 465.6253859059. The cubic root of 216807 is about 60.0746293581.

The spelling of 216807 in words is "two hundred sixteen thousand, eight hundred seven".