216641859 has 8 divisors (see below), whose sum is σ = 330120960. Its totient is φ = 123795336.

The previous prime is 216641839. The next prime is 216641891. The reversal of 216641859 is 958146612.

216641859 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 not a de Polignac number, because 216641859 - 2⁸ = 216641603 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 216641859.

It is not an unprimeable number, because it can be changed into a prime (216641809) 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, 5158119 + ... + 5158160.

It is an arithmetic number, because the mean of its divisors is an integer number (41265120).

Almost surely, 2^216641859 is an apocalyptic number.

216641859 is a deficient number, since it is larger than the sum of its proper divisors (113479101).

216641859 is a wasteful number, since it uses less digits than its factorization.

216641859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10316289.

The product of its digits is 103680, while the sum is 42.

The square root of 216641859 is about 14718.7587452203. The cubic root of 216641859 is about 600.5937261771.

The spelling of 216641859 in words is "two hundred sixteen million, six hundred forty-one thousand, eight hundred fifty-nine".