216744371 has 2 divisors, whose sum is σ = 216744372. Its totient is φ = 216744370.

The previous prime is 216744337. The next prime is 216744377. The reversal of 216744371 is 173447612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 216744371 - 2¹⁰ = 216743347 is a prime.

It is not a weakly prime, because it can be changed into another prime (216744377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108372185 + 108372186.

It is an arithmetic number, because the mean of its divisors is an integer number (108372186).

Almost surely, 2^216744371 is an apocalyptic number.

216744371 is a deficient number, since it is larger than the sum of its proper divisors (1).

216744371 is an equidigital number, since it uses as much as digits as its factorization.

216744371 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28224, while the sum is 35.

The square root of 216744371 is about 14722.2406922316. The cubic root of 216744371 is about 600.6884421842.

The spelling of 216744371 in words is "two hundred sixteen million, seven hundred forty-four thousand, three hundred seventy-one".