216311411 has 2 divisors, whose sum is σ = 216311412. Its totient is φ = 216311410.

The previous prime is 216311357. The next prime is 216311441. The reversal of 216311411 is 114113612.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216311411 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (216311441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108155705 + 108155706.

It is an arithmetic number, because the mean of its divisors is an integer number (108155706).

Almost surely, 2^216311411 is an apocalyptic number.

216311411 is a deficient number, since it is larger than the sum of its proper divisors (1).

216311411 is an equidigital number, since it uses as much as digits as its factorization.

216311411 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 144, while the sum is 20.

The square root of 216311411 is about 14707.5290582749. The cubic root of 216311411 is about 600.2882050594.

The spelling of 216311411 in words is "two hundred sixteen million, three hundred eleven thousand, four hundred eleven".