216718196 has 12 divisors (see below), whose sum is σ = 379892100. Its totient is φ = 108177600.

The previous prime is 216718171. The next prime is 216718207. The reversal of 216718196 is 691817612.

216718196 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 82992100 + 133726096 = 9110^2 + 11564^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42671 + ... + 47478.

It is an arithmetic number, because the mean of its divisors is an integer number (31657675).

Almost surely, 2^216718196 is an apocalyptic number.

It is an amenable number.

216718196 is a deficient number, since it is larger than the sum of its proper divisors (163173904).

216718196 is a wasteful number, since it uses less digits than its factorization.

216718196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90754 (or 90752 counting only the distinct ones).

The product of its digits is 36288, while the sum is 41.

The square root of 216718196 is about 14721.3517042424. The cubic root of 216718196 is about 600.6642606213.

The spelling of 216718196 in words is "two hundred sixteen million, seven hundred eighteen thousand, one hundred ninety-six".