216879843 has 8 divisors (see below), whose sum is σ = 290116288. Its totient is φ = 144114984.

The previous prime is 216879841. The next prime is 216879853. The reversal of 216879843 is 348978612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 216879843 - 2¹ = 216879841 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 216879792 and 216879801.

It is not an unprimeable number, because it can be changed into a prime (216879841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116821 + ... + 118662.

It is an arithmetic number, because the mean of its divisors is an integer number (36264536).

Almost surely, 2^216879843 is an apocalyptic number.

216879843 is a deficient number, since it is larger than the sum of its proper divisors (73236445).

216879843 is a wasteful number, since it uses less digits than its factorization.

216879843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235793.

The product of its digits is 580608, while the sum is 48.

The square root of 216879843 is about 14726.8409036018. The cubic root of 216879843 is about 600.8135657970.

The spelling of 216879843 in words is "two hundred sixteen million, eight hundred seventy-nine thousand, eight hundred forty-three".