216879433 has 8 divisors (see below), whose sum is σ = 228489120. Its totient is φ = 205289280.

The previous prime is 216879409. The next prime is 216879437. The reversal of 216879433 is 334978612.

216879433 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 216879433 - 2¹³ = 216871241 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 216879433.

It is not an unprimeable number, because it can be changed into a prime (216879437) 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, 21666 + ... + 30052.

It is an arithmetic number, because the mean of its divisors is an integer number (28561140).

Almost surely, 2^216879433 is an apocalyptic number.

It is an amenable number.

216879433 is a deficient number, since it is larger than the sum of its proper divisors (11609687).

216879433 is a wasteful number, since it uses less digits than its factorization.

216879433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9767.

The product of its digits is 217728, while the sum is 43.

The square root of 216879433 is about 14726.8269834340. The cubic root of 216879433 is about 600.8131871946.

The spelling of 216879433 in words is "two hundred sixteen million, eight hundred seventy-nine thousand, four hundred thirty-three".