216780867 has 10 divisors (see below), whose sum is σ = 323833268. Its totient is φ = 144520524.

The previous prime is 216780857. The next prime is 216780869. The reversal of 216780867 is 768087612.

216780867 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 216780867 - 2⁶ = 216780803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216780869) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1338073 + ... + 1338234.

Almost surely, 2^216780867 is an apocalyptic number.

216780867 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

216780867 is a deficient number, since it is larger than the sum of its proper divisors (107052401).

216780867 is an equidigital number, since it uses as much as digits as its factorization.

216780867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2676319 (or 2676310 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The square root of 216780867 is about 14723.4801252965. The cubic root of 216780867 is about 600.7221554704.

The spelling of 216780867 in words is "two hundred sixteen million, seven hundred eighty thousand, eight hundred sixty-seven".