216381317927 has 2 divisors, whose sum is σ = 216381317928. Its totient is φ = 216381317926.

The previous prime is 216381317861. The next prime is 216381317941. The reversal of 216381317927 is 729713183612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 216381317927 - 2¹⁶ = 216381252391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216381317527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108190658963 + 108190658964.

It is an arithmetic number, because the mean of its divisors is an integer number (108190658964).

Almost surely, 2^216381317927 is an apocalyptic number.

216381317927 is a deficient number, since it is larger than the sum of its proper divisors (1).

216381317927 is an equidigital number, since it uses as much as digits as its factorization.

216381317927 is an evil number, because the sum of its binary digits is even.

The product of its digits is 762048, while the sum is 50.

The spelling of 216381317927 in words is "two hundred sixteen billion, three hundred eighty-one million, three hundred seventeen thousand, nine hundred twenty-seven".