216771411 has 8 divisors (see below), whose sum is σ = 289297360. Its totient is φ = 144379872.

The previous prime is 216771397. The next prime is 216771421. The reversal of 216771411 is 114177612.

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

It is not a de Polignac number, because 216771411 - 2¹⁷ = 216640339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216771421) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 29776 + ... + 36333.

It is an arithmetic number, because the mean of its divisors is an integer number (36162170).

Almost surely, 2^216771411 is an apocalyptic number.

216771411 is a deficient number, since it is larger than the sum of its proper divisors (72525949).

216771411 is a wasteful number, since it uses less digits than its factorization.

216771411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67205.

The product of its digits is 2352, while the sum is 30.

The square root of 216771411 is about 14723.1590020620. The cubic root of 216771411 is about 600.7134208261.

The spelling of 216771411 in words is "two hundred sixteen million, seven hundred seventy-one thousand, four hundred eleven".